Si2493/57/34/15/04 Global ISOmodem-EVB
Contents
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3. e Rev 0 7 27 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB epis Auepuooes 53 1 6 0 180019110 61 9 11614 1220654 1 A 8 10 1 13 44 2016018 1 5 0 1 8 15 14 12 40 4660 6 6 53 ot IMLP VONL oL 200 ot E2AMCH BIP oL 2DI EE2D uc BICHL TELL FEEL BICHL biu 2154 biu 215401 40 Couvecsiacisr SILICON LABS Rev 0 7 _ ur uw dg L JL JL JL ua sua 28 512493 57 34 15 04 Global ISOmodem EVB B 2 e a iin i aa SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB coon 9 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Figure 22 Motherboard Ground Plane Layout SILICON LABS Rev 0 7 31 512493 57 34 15 04 Global ISOmodem EVB Figure 23 Motherboard Power Plane Layout 32 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB 6 Complete Design Package on CD See Sales Representative for Details Silicon Laboratories can provide a complete design package of the Si2493 57 34 15 04 EVB including the following m OrCad Schematics m Gerber Files m BOM Documentation Contact your local sales representative or Silicon Laboratories headquarters sales for or
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7. JUMPER Header CONN 1X2 TSW 102 07 T S Samtec 20 1 JP23 HEADER Header CONN 1X3 TSW 103 07 T S Samtec 1x3 21 3 JP33 JP34 JUMPER Unshroud CONN 1X2 68000 402 Berg JP35 ed 22 1 J5 11 RJ 11 RJ11 DUAL MTJG 2 64 2 2 1 ADAM TECH MTJG 23 1 J6 HEADER Header TSW 105 07 S T Samtec 5x3 24 1 J8 CONN TERM CONN 1X2 TB 1729018 PHOENIX TRBLK 2 BLK CONTACT 25 1 J9 Power 1A BARREL CONN 3 PWR ADC 002 1 Adam Tech Jack 26 1 J10 DB9 D SUB CONN 9 DBF D09S33E4GX00LF 27 1 J11 USB Type USB CONN USB B 292304 1 Tyco B 28 1 J101 HEADER Header CONN2X8 16 80 pins of 9 146252 0 Tyco AMP 8x2 08 29 1 J102 Socket 1x4 Header SSW 104 01 T S Samtec 30 1 J103 8X2 Shrouded CONN2X8 4W 5103309 3 Tyco Shrouded Header 31 1 LS1 SPEAKER 0 5 W RE 2308 NL RE 2308 NL Regal Max 32 7 R31 R40 10 1 10 W 1 ThickFilm R0603 CR0603 10W 1002F Venkel R41 R42 R43 R52 R109 R110 R111 R112 33 3 R33 R34 1 1 16 W 1 ThickFilm R0603 CR0603 16W 1001F Venkel R35 34 1 R48 100 KQ 1 10 W 1 ThickFilm R0603 CR0603 10W 1003F Venkel 35 1 R57 0 05 Q 1 4 W 5 ThickFilm R0805 LCR0805 R050J Venkel 36 1 R59 10 1 10 W 1 ThickFilm R0603 CR0603 10W 1R00F Venkel 37 1 R101 200 Q 1 10 W 5 ThickFilm R0603 CR0603 10W 2000J Venkel 38 1 R102 1 33 KQ 1 10 W 1 ThickFilm R0603 CR0603 10W 1331F Venkel 39 2 R103 R105 1 60 1 4 W 5 ThickFilm R1206 CR1206 8W 1R6J Venkel 40 11 R155 R156 6810 1 10 W 1 ThickFilm R0603 CR0603 10W 6810F Venkel R157 R158
8. SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Evaluation Board Rev 5 0 for the Si2493 57 34 15 04 ISOmodem with UART and SPI Interfaces Description The global Si2493 57 34 15 04 EVB evaluation board Rev 5 0 provides the system designer an easy way of evaluating the Si2493 57 34 15 04 ISOmodem The 512493 57 34 15 04 consists of a motherboard with a power supply an RS 232 and USB interface other ease of use features and a complete removable modem module on a daughter card A functional block diagram of the Si2493 57 34 15 04 EVB is shown below The Si2493 57 34 15 04 ISOmodem is complete controller based modem chipset with an integrated programmable direct access arrangement DAA that meets global telephone line requirements Available as a combination of one 16 pin small line side device and one 24 pin or 16 pin system side device the 6 2493 57 34 15 04 ISOmodem eliminates the need for a separate DSP data pump modem controller memories codec isolation transformer relays opto isolators and a 2 to 4 wire hybrid The Si2493 57 34 15 04 is ideal for embedded modem applications due to its small board area controller based architecture low power consumption and global compliance The Si2493 57 34 15 04 EVB provides an RJ 11 jack for interfacing the Si2493 57 34 15 04 EVB to the phone line and USB and RS232 serial ports for interfacing to a PC or data terminal This allows the ISOmo
9. Direct access to Si2493 57 34 15 04 for embedded application evaluation Easy power connection to common 7 5 13 5 V power supplies or USB port 9 V ac adaptor Simple installation and operation EEPROM 24 pin FT only RS232 lines status display on LEDs Audio Out Audio Amplifier Daughter Board Boundary Phone Interface line AOUT Si3010 for Si2404 Rev 0 7 4 11 Copyright 2011 by Silicon Laboratories Si2493 57 34 15 04 EVB 512493 57 34 15 04 Global ISOmodem EVB 1 Si2493 57 34 15 04 EVB Setup and Evaluation This section explains how to set up the Si2493 57 34 15 04 EVB for evaluation as an RS 232 or USB interface modem Jumper settings power connection PC terminal connections and terminal program configuration settings are given The initial modem setup after power is applied as well as a basic tutorial on modem operation are provided Si2493 57 34 15 04 EVB configurations for evaluating additional features are discussed separately See the Si2493 57 34 15 or Si2404 data sheets and AN93 Si2493 57 34 15 04 04 Modem Designer s Guide for complete details 1 1 Si2493 57 34 15 04 EVB Quick Start RS 232 Interface 1 Set jumpers according to Figure 1 but change J6 to the arrangement shown in Figure 3 if an FS ISOmodem package is used 2 Connect e DB 9 to PC COM 1 with a pass through cable e RJ 11 to phone line or CO simulator e 9 V ac adaptor or USB
10. L 1 x u ban 2 8 m H 3j4 4 L6 fo ek 10205 IX 4 0 OL nz 1S2EN1L8OvZ LOI et Lo 9L ein 220 QINI 911 gi LSE WepoW 3NTNISd tL 12 1 L 3 E T 913538 0 zi r WV ggg nee 1 Ig 2 4533 ias 0018 7 6 XL dOdON t s T O 848 44 gi 49095 4 49096 am sued pos 1 o qaod 3 e20 Tuo of 690 H 9519777033 05 z 465034 110410 9 3 Was N D AEEF mng sao32euuoo ver SdL Rev 0 7 16 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB oipny 157 T x 61801 1eyeeds 191 ug Pa elder u3 duy ZOA xo mu PAL ot INO 4410 xl ll _ 0 quo 20 z Ex s uo Tus ws mo 2 lw ww lt J Joyeod AL AL AL 90 Seu veu ceu 9 Jo 05 jou 165 0 O2 7 m 55 0 02 err 17 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Ajddns 19 0 721 91 06 3 13534 818150 969 coo 2 d QNO SH PN 4105
11. R159 R160 R161 R162 R163 R169 R170 Rev 0 7 21 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Table 5 Si24xx Motherboard Bill of Materials Continued Item Qty Ref Value Rating Voltage Tol Type PCB Footprint Mfr Part Number Mfr 41 3 R172 R173 20 0kQ 1 16W 1 ThickFilm R0603 CR0603 16W 2002F Venkel R174 42 1 R175 0 2A ThickFilm R1206 CR1206 4W 000 Venkel 43 1 51 SW PUSH 50 12 Tactile SW4N6 5X4 5 101 0161 EV Mountain BUTTON PB Switch 44 10 TP5 TP6 BLUE Loop TESTPOINT 151 205 RC Kobiconn TP16 TP17 TP19 TP20 TP21 TP22 TP23 TP24 45 4 TP7 TP8 Turret Turret TP 12594 2551 2 00 44 00 00 07 0 Mill Max TP9 TP25 46 1 TP11 RED Loop TESTPOINT 151 207 RC Kobiconn 47 1 U3 LT1963A 1 5A LDO SOT223 LT1963AEST 3 3 PBF Linear Tech 3 3 V max nologies 48 1 U5 EEPROM Serial TSSOP8N6 4P0 25LC320A I ST Microchip 32K 65 Technology 49 1 U10 5 0 5 LDO TO263 3N LM2937ES 5 0 National max Semiconduc tors 50 1 011 MAX3237 5 5V RS232 TSSOP MAX3237EIPWR TI 51 1 U12 CP2102 MCU QFN28N5X5P0 CP2102 GM SiLabs 5 52 2 U13 U14 IDT74CBT TSSOP 16 IDT74CBTLV3257 IDT LV3257 53 1 U18 DS1818 3 3V 10 SOT 23 DS1818 10 Dallas Semi conductor 54 1 U26 741 541 Buffer TSSOP20N6 4P 74LCX541MTC Fairchild 0 65 55 1 U27 LM4819 350 mW SO8N6 0P1 27 LM4819M National Semiconduc tor Unpopulate
12. an ac voltage The power source must be capable of continuously supplying at least 100 mA C44 serves as a filter cap for an ac input The voltage regulator U10 provides 5 V for the motherboard and the input for voltage regulator U3 which outputs 3 3 V for use on the motherboard and to power the daughter card Si24xxDC power consumption can be measured by placing a meter across R59 Power is supplied to U2 through D5 from the USB 2 1 2 Reset Circuitry The Si2493 57 34 15 04 requires a reset pulse to remain low for at least 5 0 ms after the power supply has stabilized during the powerup sequence or for at least 5 0 ms during a power on reset Most production 812493 57 34 15 04 modem chipset applications require that RESET be controlled by the host processor Certain Si2493 57 34 15 04 operation modes including powerdown require a hardware reset to recover The Si2493 57 34 15 04 EVB contains two reset options an automatic power on reset device U18 DS1818 default and a manual reset switch S1 to permit resetting the chip without removing power A reset regardless of the mechanism causes all modem settings to revert to factory default values 2 1 3 Automatic Reset DS1818 The DS1818 is a small low cost device that monitors the voltage on Vp and an external reset pushbutton If Vp drops below 3 0 V the DS1818 provides a 220 ms active low reset pulse On powerup the DS1818 also outputs an active low reset pulse for 22
13. 43V Zener SOD 123 BZT52C43 7 F Diodes Inc Rev 0 7 15 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB 998191 OL 31 0613 a gra P usa 189 uui 7 59 1 squeTeatnbe 108215 101 14 3 ees 2 siu T89 wu XXpZIS F youn T sra P uia 189 V V O 8 t ih L6 qud youn Sra 189 V V V6SIH 1 gy L8 701 9 dINI 1nOV 9T 94 O 9 Oed L sv 24 quid ST 9
14. 6 above The modem should then work as expected no changes are needed on the motherboard 1 3 2 3 27 MHz For 27 MHz populate Y3 with the small surface mount oscillator shown in the BOM and remove and Y1b if present Also remove any capacitors at the C40 and C41 positions Strap R101 to R106 as shown in Figures 5 or 6 above The modem should then work as expected no changes are needed on the motherboard 1 3 2 4 SPI Mode Setup To change to SPI mode setup it is necessary to configure the R101 straps as shown in Figure 5 Figure 6 according to the package and clock used Then setup the daughter card with neither UART nor USB operation selected i e with no jumper on JP23 The SPI signals can then be obtained on J103 the system connector and connected to the host Signal usage is described in Table 2 Table 2 Signal Usage SPI Function JP23 Pin Number Legacy Pin Function SPI_CSb RTSb SPI_MISO RXD SPI MOSI TXD SPI SCLK 11 CTSb 1 3 3 Parallel Bus Mode Setup To change to parallel bus mode setup it is necessary to configure the R101 straps as shown in Figure 5 or Figure 6 according to the package and clock used Then setup the daughter card with neither UART nor USB operation selected i e with no jumper on JP23 The SPI signals can then be obtained on J103 the system connector and connected to the host See the data sheet and schematic for signal and pin usage 1 4 Power Requir
15. IN rera 0533 105 55 13838 x 35 veo 992106 145 512 G5 Ss 50 6 1 1 1 d qau OSIN 148 o 2 24 959 145 951 6 9 2 13539 13S3 8 m a 8 148 9510 Gs vio vio 9033 1110 19 Fe oy asa NONO ISON 195 2 AXL _ ______________ VIO VIO OSIW las axy 8 LL 0599 106 450 148 4818 9 radi 5 9L 4514 1033 006 00 91 VIX E gt 9 OIX 2 oux asd Ki ON aiNiinoy ETT SS QE 94 q os3 ALNI 9 0 9 SONIS OUS z 1 FWIXNDHO nzzo i WIX 8 T anzzo 6rz S 42 aan o 2 119 zin 55 6l k gt wo Lo 1 ELN 40 eum ve S sped uid gt nr n QE 20 io si ped apis wayskg euo 5 gt 5 SILICON LABS Rev 0 7 12 512493 57 34 15 04 Global ISOmodem EVB VVC 0 9 08 6 6 941614 30 30 810815 go 61 190 Lod 9750909 E0909 anyo 401 0 0 19
16. connection is established a CONNECT message appears indicating the two modems are in the data mode and communicating Typing on one terminal should appear on the other terminal To return to the command mode without interrupting the connection between the two modems type Approximately two seconds later OK appears The modem is now in command mode and accepts AT commands Type or ATHO to terminate the data connection or type ATO to return to the data mode After the ATO command the modem resumes the data connection and no longer accepts AT commands 1 7 EVB Part Numbers The ISOmodem evaluation boards are offered in multiple speeds and packaging options The first four numbers indicate the system side device The next two letters indicate the system side package FS Lead free 16 pin SOIC FT Lead free 24 pin TSSOP The final two numbers indicate the line side device See Figure 7 i2457 D FS18 EVB LS Part Number Si30xx SS Package SS Revision SS Part Number Figure 7 EVB Part Number Example 2 Si2493 57 34 15 04 EVB Functional Description The Si2493 57 34 15 04 EVB is multipurpose evaluation system The modem daughter illustrates the small size and few components required to implement an entire controller based modem with global compatibility The daughter card can be used independently of or in conjunction with the motherboard The motherboard adds feature
17. in the EVB because it is intended for HW SW development and is not needed for a production design This amplifier can drive an 8 O speaker with 200 mW of Call progress audio i e ISOmodem s call progress dialing and negotiation tones The power amplifier itself is a low cost rugged H bridge type device There are several pin compatible designs from multiple vendors that can provide alternate price power tradeoffs for this amplifier This power amp can be shut down by removing jumper JP12 The signal at JP12 can also be tied to a control signal to allow the host to shut down the amplifier The customer can change the values of R172 and R173 when integrating the EVB to his system but should keep the RC formed by C37 and R173 at a 50 Hz or higher corner to avoid a power on thump 2 1 11 3 The Call Progress Speaker The Call progress speaker Regal RE 2308 NL is connected to the amplifier via a jumper JP14 If another speaker is to be connected then it is necessary to remove JP14 and connect the external speaker to JP11 Pins 1 and 4 It is important to remember that the speaker signal is differential Both the output pins are driven outputs and must not be grounded Table 3 DB9 Pin Connections J1 Name J1 Symbol J1Pin Si2493 57 34 15 2493 57 34 15 04 Pin 04 Name Carrier Detect CD 1 See note DCD EESD Received Data RXD 9 RXD Transmit Data TXD 10 TXD Data Terminal
18. 0 ms after Vp reaches 90 of the nominal 3 3 V value The DS1818 outputs a 220 ms reset pulse any time the power supply voltage exceeds the 3 3 V 10 window 2 1 4 Manual Reset The manual reset switch S1 performs a power on reset This resets the Si2493 57 34 15 04 to factory defaults without turning off power Pressing S1 activates the reset monitor in the DS1818 and produces a 220 ms active low reset pulse 2 1 5 EEPROM Enable FT Only Connecting JP34 and JP35 enables the optional EEPROM U5 See 93 Si2457 Si2434 Si2415 Si2404 Modem Designer s Guide for programming details 2 1 6 Interface Selection The serial interface of the Si2493 57 34 15 04 EVB can be connected to a computer terminal embedded system or any other data terminal equipment DTE via a standard RS 232 interface USB interface or through a direct TTL serial interface The Si2493 57 34 15 04 can be tested as a standard data modem by connecting the Si2493 57 34 15 04 EVB to a personal computer or other DTE power supply and a phone line A PC can communicate with the Si2493 57 34 15 04 EVB using a standard terminal program such as HyperTerm or ProComm Jumper settings determine how the Si2493 57 34 15 04 EVB is connected to the DTE 2 1 7 RS 232 Interface This operation mode uses the standard factory jumper settings illustrated in Figure 1 on page 3 The Maxim MAX3237 transceiver interfaces directly with the TTL levels availabl
19. 044 n gt 9 la lo ls g e eule4 222 54 ln lt lt lt lt E 5 Naks vL A 9 Er Sr E rou gp 11089 262 de 02 inozu oQ 6 262 518 z yx 2 gt lt 5 262 810 1 0510 i Y 7 a mor 091 E 1 usa Nis De nos TUUS eaa 0 1 1 6r OF zez qu 8014 4 aol zz gt o 10061 262705 4 18419 gg o 1002 862 510 4 Laxy 521 gt o 10041 anro 59 20 Ynvo so anoj 52 I 8 s LIIS an 349 any m 859 39 s tosoveln7a 989 1 e wyo 009 884 Ager 19 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB 5 Bill of Materials Si24xx Motherboard Table 5 Si24xx Motherboard Bill of Materials Item Qty Ref Value Rating Voltage Tol Type PCB Fooiprint Mfr Part Number Mfr 1 8 C21 C23 10V 10 X7R C0603 C0603X7R100 105K Venkel C37 C43 C54 C55 C69 C74 2 17 C24 C25 0 1 uF 10V 20 X7R C0402 C0402X7R100 104M Venkel C26 C27 C53 C56 C57 C58 C59 61 C62 C63 C71 C72 C75 C96 C98 3 3 C42 C51 0 01 25 10 X7R C0402 C0402X7R250 103K Venkel C60 4 1
20. C44 470 uF 25V 20 Alum_Ele C10 3X10 3MM EMVE250ADA471MJAOG United Chemicon 1 C48 0 1 uF 50V 10 X7R C0603 C0603X7R500 104K Venkel 2 C49 C66 10 uF 16V 10 X5R C0805 C0805X5R160 106K Venkel 3 C52 C70 560 pF 16V 10 X7R C0603 C0603X7R160 561K Venkel C73 1 C97 1 nF 100 V 10 X7R C0603 C0603X7R101 102K Venkel 8 DN1 DN2 15V 225 mW 15V Zener SOT23 AAK MMBZ15VDLT1G On Semi DN3 DN4 Dual DN5 DN6 DN7 DN8 10 2 D11 D13 STPS140Z 1 0A 40 V Schottky SOD 123 STPS140Z ST MICRO 11 1 D12 Bridge 0 8A 100 V BRIDGE MiniDIP4 HD01 T Diodes Inc Rectifier 12 3 014 015 MMBD300 225 mA 300 V DUAL SOT23 AKC MMBD3004S 7 F Diodes Inc D49 4S 7 F 13 11 D41 D42 RED 25 mA 1 9V SMT LED HSMX HSMC C170 Avago 43 D44 Chip LED C170 Technologies D45 D46 D47 D48 D50 D52 D53 14 1 D54 BAV23A 400mA 200V DUAL SOT23 KKA BAV23A Diodes Inc 15 5 FB6 FB7 600 Ohm 200 mA SMT 0603 BLM18AG601SN1 MuRata FB8 FB9 FB11 16 4 HW1 HW2 spacer 2397 SPC HW3 HW4 Technology 17 4 HW5 HW6 screw NSS 4 4 01 Richco HW7 HW8 Plastic Co 20 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Table 5 Si24xx Motherboard Bill of Materials Continued Item Qty Ref Value Rating Voltage Tol Type PCB Footprint Mfr Part Number Mfr 18 1 JP11 HEADER Header CONN 1X4 TSW 104 07 T S Samtec 4X1 19 2 JP12 JP14
21. ON sex oN 2 ZHW 2516 7 ON ON ON ZH 26 145 ON ON S94 ON 9r SL 891726 0 X Sax ON oN ZHW LZ 1 0 oN oN 91 91 51 m c QNI vL A n L AAA 919539 891726 145 2 ON ON ZHW 2516 7 luvn on ON ON ON qid 21 OL 6 LL 002 9519 ZHW 2516 7 145 991 ON ON cold 2014 105 OL 6 002 IH HONAS4 InOV o 063 AE 8 22002 orig ANE 458 2 25 8 91 LS 9519 9074 5014 1 2014 9 08 lt apis SAS 91 tiz 118 8 1004 9510 E 4514 33 005 1 95953 0 _ 8 9 0 5 epis pz 5 EXAM 9019 7 77 9 Sl 91 68 MOL 9019 11792 108 99 LYO Jo senjeA 1 HNW QIN sa ouanba pue 3181197 8 9 ALA LA 01 HONASS 77998 9 d 2018 01 Sl vZ 9Nd 68 05 Adee pvo e 1no QNO AOL 019 9519 Il PZ 94d 9 8 9 VIX 2 pe zwi ON LX eae luo esn sqejg aeo g 210 N 7 OIX sso 10 ese i HABIL ai ERS 1 ul 29 22 9
22. Output Call progress audio output is provided by the Si2493 57 34 15 04 on the AOUT pin as a PWM signal This signal allows the user to monitor call progress signals such as dial tone DTMF dialing ring busy signals and modem negotiation Control of this signal is provided by AT commands and register settings described in the introduction The AOUT signal is connected to an on board amplifier for a high quality output AOUT can also be connected to a summing amplifier or multiplexer in an embedded application as part of an integrated audio system 2 1 11 1 AOUT Audio Processing The AOUT signal discussed in this section leaves the 812493 57 34 15 04 is processed demodulated by a high pass filter R133 134 135 and C24 C25 26 C27 It is critically important to not put a dc load on the AOUT pin since the pin also acts as a modem feature control on reset and is internally weakly pulled up Any unintentional dc load on prevents proper operation of the modem See AN93 Si3457 34 15 04 Modem Designers Guide for more details on the features controlled by pin strapping Since this PWM signal swings rail to rail and is simply filtered by a low pass filter to acquire the audio It is important to keep the power supply to the modem free of noise in the audio spectrum 2 1 11 2 The Audio Output Amplifier LM4819 The Power amplifier on the EVB is powered by a current limited 4 2 V supply The current limit is implemented
23. Ready DTR 4 See note ESC RI Signal Ground SG 5 6 GND Data Set Ready DSR 6 See note INT AOUT Ready to Send RTS 7 See note RTS RXCLK Clear to Send CTS 8 11 CTS Ring Indicator RD 9 17 RI Note JP6 jumper option 10 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB 2 2 Modem Daughter Card Operation The 512493 57 34 15 040 daughter is complete modem solution perfectly suited for use in an embedded system The daughtercard contains both the modem system side chip and the isolated line interface DAA The daughter card requires a 3 3 V supply capable of providing at least 35 mA and communicates with the system via LVCMOS TTL compatible digital signals on JP1 The RJ 11 jack TIP and RING is connected via JP2 Be sure to provide the proper power on reset pulse to the daughter card if it is used in the stand alone mode 2 2 1 Reset Requirements The 512493 57 34 15 04 ISOmodem daughter card must be properly reset at powerup The reset pin pin 8 of the Si2493 57 34 15 04 JP103 J101 pin 13 must be held low for at least 5 0 ms after power is applied and stabilized to ensure the device is properly reset 2 2 2 Crystal Requirements Clock accuracy and stability are important in modem applications To ensure reliable communication between modems the clock must remain within 100 ppm of the design value over the life of the modem The crystal selected for use in a modem application mus
24. Ref Value Rating Voltage Tol Type PCB Footprint Mfr Part Number Mfr 1 2 C1 C2 33 pF 2 250V 10 Y2 C1808 SCC1808X330K502T Holy Stone 2 1 03 0 01 uF 250V 10 X7R C0805 GRM21BR72E103KWO03L Murata 3 1 C4 1 50V 20 Alum Elec C3 3X3 3MM EEE1HS010SR Panasonic 4 2 C5 C6 0 1 uF 16V 20 X7R C0603 C0603X7R160 104M Venkel 5 1 C7 2 7 nF 50V 20 X7R C0603 C0603X7R500 272M Venkel 6 2 08 C9 680 pF Y2 250 10 Y2 C1808 5 1808 681 502 Holy Stone 1 C10 0 01 uF 16V 20 X7R C0603 C0603X7R160 103M Venke 8 2 C40 18 pF 50V 5 COG C0603 C0603COG500 180J Venke C41 9 3 C50 0 1 uF 10V 20 X7R C0603 C0603X7R100 104M Venke C52 C56 10 2 C51 0 22 UF 6 3V 10 X5R C0603 C0603X7R6R3 224K Venke C53 11 1 C54 1 25V 10 X5R C0603 C0603X5R250 105K Venke 12 1 D1 HD04 0 8A 400 V BRIDGE MiniDIP4 HD04 T Diodes Inc 13 3 FB1 6000 200 mA SMT 10603 BLM18AG601SN1 Murata FB2 FB5 14 1 J1 SOCKET 8x2 SOCKET SOCKETX8 100 SMT SSW 108 22 G D VS Samtec 15 1 J2 4X1 Header 0 CONN 1X4 100 SMT TSM 104 01 T SV Berg 16 2 Q1Q3 MMBTA42LT1 200mA 300V NPN SOT23 BEC MMBTA42LT1 On Semi 17 1 Q2 921 1 100 mA 300 V PNP SOT23 BEC MMBTA92LT1 On Semi 18 2 04 05 MMBTAOGLT1 500 mA 80V NPN SOT23 BEC MMBTAO6LT1 On Semi 19 1 RV1 P3100SB 275 V Sidactor DO 214AA NP P3100SBL Littelfuse 20 1 R1 1 07 1 2 W 1 ThickFilm R2010 CR2010 2W 1071F 21 1 R2 1500 1 16 W 5 ThickFilm R0603 CR0603 16W 151J Venke 22 1 R3 3 65 12W 1 Thic
25. al support request Silicon Laboratories Silicon Labs and ISOmodem are trademarks of Silicon Laboratories Inc Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice Silicon Laboratories assumes no responsibility for errors and omissions and disclaims responsibility for any consequences resulting from the use of information included herein Additionally Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters Silicon Laboratories reserves the right to make changes without further notice Silicon Laboratories makes no warranty rep resentation or guarantee regarding the suitability of its products for any particular purpose nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation conse quential or incidental damages Silicon Laboratories products are not designed intended or authorized for use in applications intended to support or sustain life or for any other application in which the failure of the Silicon Laboratories product could create a situation where per sonal injury or death may occur Should Buyer purchase or use Silicon Laboratories products for any suc
26. aud detects the DTE speed data length parity and number of stop bits If JP33 is installed autobaud is disabled Configure the terminal emulation program to 19200 bps eight data bits no parity one stop bit and hardware CTS handshaking Connect the RJ 11 jack on the Si2493 57 34 15 04 EVB to an analog phone line or telephone line simulator such as a Teltone TLS 5 1 6 Making Connections With the terminal program properly configured and running apply power to the Si2493 57 34 15 04 EVB Type lt gt and the modem should return indicating the modem is working in the command mode and communicating with the terminal If the OK response is not received try resetting the modem by pressing the manual reset switch S1 then again type AT lt cr gt Next type ATI6 lt cr gt The modem should respond with 2493 2457 2434 2415 or 2404 indicating the terminal is communicating with an Si2493 812457 512434 512415 Si2404 Type 50 2 lt gt to configure the modem to answer on the second ring To take the modem off hook type ATH1 lt cr gt The modem should go to the off hook state draw loop current and respond with an OK Next type ATH cr or ATHO lt cr gt and the modem should hang up go on hook and stop drawing loop current To make a modem connection type ATDT called modem phone number lt cr gt Once the
27. cable 3 Bring up e Turn on power to modem e Autobaud automatically adjusts modem DTE speed and protocol 4 Type AT followed by a carriage return e Should echo AT and then an 1 2 Si2493 57 34 15 04 EVB Quick Start USB Interface 1 Set jumpers according to Figure 3 but change J6 to the arrangement shown in Figure 3 if an FS ISOmodem package is used 2 Connect e USB cable to PC e RJ 11 to phone line or CO simulator 3 Download USB driver for your operating system from the CD supplied with the evaluation board 4 Install driver 5 Bring up e Reset the modem e Autobaud automatically adjusts modem DTE speed and protocol 6 Type AT followed by a carriage return e Should echo AT and then an OK 1 3 Motherboard and Daughter Card Configuration The EVB consist of a motherboard that takes a plug in daughter card The motherboard can be configured in a variety of ways that are explained below and are managed via jumpers The daughter card contains both the modem system side and the isolated line interface DAA The daughter card comes preconfigured and functional although the user may decide to change some operating options such as the type of crystal used with the modem chip or the type of control signals used i e UART vs parallel These features must be managed by changing strapping resistors soldered down to the daughter card and by changing parts associated with the crystal These
28. d Figure 4 Modem Daughter Card Rev 2 0 Top and Bottom Views Pin7 Pinil Pin3 15 CTSb AOUT INTb FSYNCH RI DCDb R101 R102 R103 R106 No No No No UART 4 9152 MHz No No No Yes UART 27 MHz No Yes No No SPI 32 kHz No Yes No Yes SPI 27 MHz No No Yes X UART 32 kHz No Yes Yes x SPI 4 9252 MHz Figure 5 101 106 Setup for Clock and Mode Configuration on the DC with the 16 Pin FS Package 6 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Pinll 15 16 17 Pin23 CTSb AOUT INTb INTb RIb DCDb R101 R102 R104 R105 R106 No No Yes No Yes SPI 27 Mhz No No Yes Yes x SPI 4 9152 MHz No No Yes No No SPI 32 768 kHz No No No Yes UART 32 768 kHz No No No No No UART 4 9152 MHz No No No No Yes UART 27 Mhz Yes Yes X x Parallel 27 Mhz No Yes x x Parallel 4 9152 MHz Figure 6 R106 Setup for Clock and Mode Configuration on DC with 24 Pin FT Package 1 3 2 1 32 kHz Setup For 32 kHz populate Y1 with the 32 KHZ crystal shown in the BOM and use 18 pF capacitors for the C40 C41 values Also remove Y3 and Y1b if present and strap R101 to R106 as shown in Figure 5 The modem should then work as expected no changes are needed on the motherboard 1 3 2 2 4 9152 MHz For 4 9152 MHz populate Y1b with the 4 9152 MHz crystal shown in the BOM and use 33 pF capacitors for the C40 and C41 values Also remove Y3 and Y1 if present and strap R101 to R106 as shown in Figures 5 or
29. d Components 56 1 J7 2MM RT SHROUD CONN1X5 S5B S5B PH SM4 TB JST ANG ED PH SM4 TB 1 1 R39 10 1 10 W 1 ThickFilm R0603 CR0603 10W 1002F Venkel 1 1 R108 0 1A ThickFilm R0603 CR0603 16W 000 Venkel 22 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Uu99J9SXIIS opis 1914 941614 0724 00 5 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB oa m 05 Figure 15 Daughter Card Secondary Side Silkscreen gt m mj ro CO t 523 nis m 00 i H 0 9 gt a lt SILICON LABS 1 4 L k e pm A a mr lt gt SILICON LABS 25 4 15 04 7 3 512493 5 Global ISOmodem EVB 512493 57 34 15 04 Global ISOmodem EVB 100 5 3310 RING 90 2V 21 1 49 TELEPHONE PSTN LINE TIP C97 R172 m R73 9 3 3V PWR SILICON LABS Si24xxEVB REV 5 0 t 8 pso J R161 e qpu3 duy e qpsig pnbqoiny 40 15 3 e qpu3 WO3d33 TE o a AOUT D49 15 296 9 12 o o 6 L J 05 5 Figure 18 Motherboard Primary Side Silkscreen 740 5054 5 posi svo 0 sra p 514 pop usa e
30. dem to operate as a serial modem for straightforward evaluation of the Si2493 57 34 15 04 To evaluate the Si2493 57 34 15 04 ISOmodem embedded system the daughter card can be used independently of or with the motherboard Functional Block Diagram 7 5 13 5 V dc or peak ac Adaptor Rectifier Filter USB USB Connector Transceivers Voltage Regulator T 5V 3 3 V Direct Access HDR Interface Selection Jumpers Si2493 57 34 15 04 RESET XTALO A direct access header J103 is available on the motherboard to bypass the RS 232 transceivers and connect the Si2493 57 34 15 04 ISOmodem directly to a target system An on board rectifier filter and voltage regulator allow the power input to be 7 5 13 V ac or dc either polarity supplied through a screw terminal J8 or a standard 2mm power jack J9 Alternatively power can be supplied through the USB interface whether the USB or RS232 interface is used The evaluation board can drive an external speaker for call monitoring or the speaker mounted directly on the board Please note that the PCM interface parallel interface and EEPROM are available on the 24 pin FT only See 1 7 EVB Part Numbers page 8 for EVB options Features The Si2493 57 34 15 04 EVB includes the following m Dual RJ 11 connection to phone line m RS 232 and USB interface to PC m Speaker for call monitoring
31. dering information Rev 0 7 SILICON LABS 33 512493 57 34 15 04 Global ISOmodem EVB DOCUMENT CHANGE LIST Revision 0 2 to Revision 0 3 m Updated Figure 15 Daughter Card Secondary Side Silkscreen on page 24 m Updated Figure 16 Daughter Card Primary Side Layout on page 25 m Updated Figure 17 Daughter Card Secondary Side Layout on page 26 m Updated Bill of Materials Si24xx Daughter Card Revision 0 3 to Revision 0 4 m Changed from Rev 1 0 to Rev 1 1 Daughter Card Revision 0 4 to Revision 0 5 m Changed from Rev 3 1 to Rev 3 2 Motherboard Revision 0 5 to Revision 0 6 m Changed from Rev 1 1 to Rev 1 2 Daughter Card m Added FS SOIC Package Option Revision 0 6 to Revision 0 7 Changed R1 2 to 2 0 daughtercard Changed R32 to 5 0 motherboard Changed power amplifier chip and speakers Removed connector to SSI BUS Changed regulator and power on reset circuit Changed various jumper locations 34 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB NOTES SILICON LABS Rev 0 7 35 512493 57 34 15 04 Global ISOmodem EVB CONTACT INFORMATION Silicon Laboratories Inc 400 West Cesar Chavez Austin TX 78701 Tel 1 512 416 8500 Fax 1 512 416 9669 Toll Free 1 877 444 3032 Please visit the Silicon Labs Technical Support web page https www silabs com support pages contacttechnicalsupport aspx and register to submit a technic
32. e at the serial interface of the Si2493 57 34 15 04 and using internal charge pumps makes these signals compatible with the RS 232 standard The RS 232 transceiver on the Si2493 57 34 15 04 EVB can communicate at rates between 300 bps and 1 Mbps This simplifies the connection to PCs and other data terminal equipment DTE The signals available on the Si2493 57 34 15 04 EVB serial interface DB9 connector are listed in Table 3 2 1 8 USB Interface The USB cable connects to J10 on the motherboard and provides both data and power Installing a jumper on JP23 enables the USB interface and disables the RS 232 interface The USB interface is provided by U12 A USB driver for this chip is available for most PC and MAC operating systems on the CD Rev 0 7 9 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB 2 1 9 Direct Access Interface While the motherboard supplies power through J8 J9 or USB power on reset and an RJ 11 jack for the modem the direct access interface J103 is used to connect the motherboard to an embedded system J103 provides access to all Si2493 57 34 15 04 signals available on the daughter card It is necessary to remove the jumper on JP23 to disable both the RS 232 and USB interface and prevent signal contention 2 1 10 PCM Interface 24 Pin FT Only The Si2493 57 34 15 04 PCM interface can be demonstrated using the voice motherboard not with this EVB 2 1 11 AOUT Call Progress Audio
33. eard by enabling the call progress feature via software see AN93 and Hardware The hardware components include installing JP12 which enabled the audio power amplifier and installing JP14 to connect the on board speaker to the power amplifier output If an offboard speaker is to be used then JP14 can be removed and the alternate speaker can be connected to pins 1 and 4 of JP11 Note the this audio output is 80 and differential so that neither output pin should be grounded 1 3 1 5 Control Line Configuration Various modem control lines can be rearranged depending on the user preferences and the specific modem chips used This is done using JP6 The basic two JP6 configurations are shown in the following figures 1 3 4 6 7 9 10 12 13 15 Figure 2 Default J6 Setup for 24 Pin Modem Chips 7 10 12 13 15 Figure 3 Default J6 Setup for 16 Pin Modem Chips The specific details of what the jumpers connect are shown in Table 1 which is also found printed on the underside of the EVB 9 Table 1 Routing of Control Signals with Jumper Position on 46 RS232 Si24xx 24 Pin Si24xx 16 Pin 512401 Signal Left Right Left Right Left Right DCD DCD SDI EESD DCD NC DCD NC RI RI FSYNCH NC RI NC RI DTR ESC RI ESC NC ESC NC RTS RTS SDO NC RTS NC GPIO1 EECLK DSR INT AOUT INT NC INT NC AOUT INT 4 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB 1 3 2 Daughter Ca
34. ements The Si2493 57 34 15 04 EVB has an on board diode bridge filter capacitor and voltage regulator U10 and U18 Power can be supplied from any source capable of providing 7 5 V 13 V dc or 7 5 13 V peak ac and at least 100 mA Additional current may be required if a speaker is connected for monitoring call progress tones Power may be applied to the Si2493 57 34 15 04 EVB through the screw terminals J8 the 2 mm power jack J9 or the USB cable even if the modem is configured for RS 232 operation The onboard full wave rectifier and filter ensure the correct polarity is applied to the Si2493 57 34 15 04 EVB Daughter card current can be measured by connecting a DVM across R59 a 1 O resistor using the supplied test points on Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB either side 1 5 Terminal and Line Connections The Si2493 57 34 15 04 can be tested as a standard serial data modem by connecting the Si2493 57 34 15 04 EVB to a personal computer or other data terminal equipment DTE phone line and power Connect a PC serial port to the DB9 connector on the Si2493 57 34 15 04 EVB with a pass through cable The RS 232 transceivers on the EVB can communicate with the DTE at rates up to 1 Mbps Any standard terminal program such as HyperTerminal or ProComm running on a PC communicates with the Si2493 57 34 15 04 EVB The standard factory jumper configuration has autobaud enabled Autob
35. h unintended or unauthorized ap plication Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages 36 Rev 0 7 SIL gt ICON LABS
36. kFilm R2010 CR2010 2W 3651F 23 1 R4 2 49 kO 12W 1 ThickFilm R2010 CR2010 2W 2491F Venke 24 2 R5 R6 100 kQ 1 16 W 5 ThickFilm R0603 CR0603 16W 104J Venke 25 2 R7 R8 20 MO 1 8 W 5 ThickFilm 0805 CR0805 8W 206J Venke 26 1 R9 1 116W 1 ThickFilm R0603 CR0603 16W 1004F Venke 27 1 R10 536 0 1 4 W 1 ThickFilm R1206 CR1206 4W 5360F Venke 28 1 R11 73 2 Q 1 2 W 1 ThickFilm R2010 CR2010 2W 73R2F Venke 29 2 R12 56 20 116W 1 ThickFilm R0603 CR0603 16W 56R2F Venke R13 30 2 R15 00 1A ThickFilm R0603 CR0603 16W 000 Venke R16 31 2 R120 00 1A ThickFilm R0603 CR0603 16W 000 Venke R121 32 1 R18 1 2kQ 110W 5 ThickFilm R0603 CR0603 10W 121J Venke 33 4 R101 10 110W 5 ThickFilm R0603 CR0603 10W 103J Venke R102 R103 R104 R106 14 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Table 4 Si24xx Daughter Card Bill of Materials Continued Item Qty Ref Value Rating Voltage Tol Type PCB Footprint Mfr Part Number Mfr 34 1 R105 1 1 10 W 5 ThickFilm R0603 CR0603 10W 102J Venkel 35 3 R110 200 Q 1 10 W 5 ThickFilm R0603 CR0603 10W 2000J Venkel 36 1 U2 513018 300 LineSide SO16N6 0P1 27 Si3018 F GS SiLabs 37 1 U12 Si24xx ISOMODEM TSSOP24N6 4P0 65 Si2493 E FT SiLabs 38 1 U13 Si24xx 16 pin 16pin SOIC 2493 Silicon Laboratories 39 1 Y1B 32 768 kHz XTAL 3X8 LD ECS 327 12 5 8X ECS Y1 Y3 International 40 1 21 43V 500 mw
37. possible changes are explained below 1 3 1 Motherboard Configuration Check all the jumper setting on the S2493 57 34 15 04 EVB before applying power The standard factory setting for the modem in a 24 pin FT package are shown in the figure below This setup configures the modem for RS232 serial operation with autobaud enabled Any standard terminal program configured to communicate through a PC com port can be used to communicate with the EVB Figure 1 shows the default motherboard setup for the FT package daughter card as well as the functions of connectors and jumpers 2 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB dnjas 086001911011 1 8 90 1 941614 pueoquaujow 5141 TOES AMOR 653 3unus WYO Xu X se HJ JOU IM O 1401 pajnos o 0 sjuiod 3 O T au paunseaw se s ul 02300 SUOISJAA pled 8 aq 01514815 1591 95991 6 aq o ye 10 501615 sjeuSis MO e1eui asuss pue uonnqusnd MS POU Ie Selly 5104 IM pue diy STOL HUM YY s3u od 5159 19594 101294405 W JS S 1591 pue 5011 spied 8
38. rd Configuration The daughter card comes configured with either a 24 pin FT or 16 pin FS system side part and either 32 kHz or 4 9152 MHz operation and UART operation The daughter card can also be setup to operate with a third clock frequency an on board 27 MHz oscillator To change between these options requires component changes on the daughter card The daughter card can also operate in three possible interface modes parallel bus mode in SPI mode as well as the default UART mode There are six small 0402 strapping resistors R101 to R106 that are on the daughter card and are configured differently depending on the combination of chip package clock frequency chosen and interface mode See Figures 5 and 6 for details The card and its options are shown in Figure 4 which shows the Modem Daughter card Rev 2 0 top and bottom views with the critical parts that may be changed to select another command mode i e SPI or an alternate crystal frequency such as 4 9152 MHz Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB Three possible crystals or ext oscillator 82 0 8 These option strapping resistors select VIEW modem command mode UART SPI or Parallel and crystal clock frequency 28 m 8 R120 B m R121 8 mam C54 285 C5e m mim m m m BOTTOM VIEW Crystal loading caps C40 amp C41 specific to the crystal type use
39. s that enhance the ease of evaluating the many capabilities of the Si2493 57 34 15 04 ISOmodem 2 1 Motherboard The motherboard provides a convenient interface to the 2493 57 34 15 04 DC daughter card The versatile power supply allows for a wide range of ac and dc voltages to power the board RS 232 transceivers and a DB9 connector allow the Si2493 57 34 15 04 EVB to be easily connected to a PC or other terminal device Jumper options allow direct access to the LVCMOS TTL level serial inputs to the Si2493 57 34 15 04 bypassing the RS 232 transceivers or USB interface This is particularly useful for directly connecting the Si2493 57 34 15 04 to embedded systems The Si24xxURT EVB motherboard connects to the daughter card through two connectors JP101 and JP2 JP101 is an 8x2 header providing connection to all Si2493 57 34 15 04 digital signals and regulated 3 3 V power for the Si2493 57 34 15 04 The Si2493 57 34 15 04 digital signals appearing at JP101 daughter card interface are LVCMOS and TTL compatible JP2 is 4x1 socket providing connection between the daughter 8 Rev 0 7 SILICON LABS 512493 57 34 15 04 Global ISOmodem EVB card and the RJ 11 phone jack 2 1 1 Voltage Regulator Power Supply The input voltage to either J8 or J9 must be between 7 5 and 13 5V dc or 7 5 and 13 5 ac The motherboard includes a diode bridge D12 to guard against a polarity reversal of the dc voltage or to rectify
40. sn 51 pue sayeads 220 dwe ynys 01 Jeduunf e je uni pedf qeu s1eduunf uoneJn8ijuoo 55948044 jeD oipny 270 anoway ui Jeduunf 348su vedl 8 5 4 14954 041009 JO s1eduun or Rev 0 7 SILICON LABS Si2493 57 34 15 04 Global ISOmodem EVB 1 3 1 1 RS232 vs USB vs User Provided IO Selection To change to USB operation simply move the RS232 selection jumper on JP23 to the USB position as marked on the PCB and shown in Figure 1 When the USB vs UART settings are changed the appropriate indicator LED will light up on the EVB If neither jumper is in place then neither serial port will be activated and the user must provide I O signals via the pins on J103 This IO can be in ASYNCH SERIAL SPI SERIAL and Parallel Bus mode 1 3 1 2 Autobaud Control Autobaud is enabled with no jumper at the JP34 position When a jumper is in place autobaud is disabled and the user must setup the host to run 19k2 baud in order to use the modem 1 3 1 3 EEPROM Control To enable the EEPROM U5 both jumpers JP34 and JP35 must be in place and the modem reset JP35 physically connects the EEPROM chips select line to the modem and allows the EEPROM to function when addressed by the modem while JP34 connects a strapping option to the correct modem pin which is sensed during reset and instructs the modem firmware to use the EEPROM 1 3 1 4 Call Progress Configuration The modem call establishment can be h
41. t have a frequency tolerance of less than 100 ppm for the combination of initial frequency tolerance drift over the normal operating temperature range and five year aging Other considerations such as production variations in PC board capacitance and the tolerance of loading capacitors must also be taken into account 2 2 3 Protection The Si2493 57 34 15 04 EVB meets or exceeds all FCC and international PTT requirements and recommendations for high voltage surge and isolation testing without any modification The protection isolation circuitry includes C1 C2 C8 C9 FB1 FB2 and RV1 The PCB layout is also a key component in the protection circuitry Si2493 57 34 15 04 EVB provides isolation to 3 kV Contact Silicon Laboratories for information about designing to higher levels of isolation Rev 0 7 SILICON LABS 11 512493 57 34 15 04 Global ISOmodem EVB 3 Design o e Peaks LO w m st e 0 0 6 75 6 56 8 941614 lt ZHW 2516 7 3 x ON ZHW 250677 145 991 son anyo ZUN LZ x x x Sox Sox ZHX ZE 0 x Sox ON O y 989 ZUN LZ 0 sox oN oN oN ZHW LZ 145 Sox
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