MSM7731-01 Evaluation Board User`s Manual
Contents
1. 2 April 1998 Figure 1 Board Schematic 1 3 89 5 o o E R A BEES JC Lla Qh 2 Oo amp mj m el Tei OOOO E JE z wa a un SB1 psw2 SeSEBHRBlaalERa2bs 2090902 BIRRAa2285 TP3 SE Aja Ej 2374 PCMEI HEH r_ y PME Ze PCMI JP PCMI en SB1 P amp H CLKSEL a 5 BCLK Ha BCLK syYNc Ha SYNC TP3 SB2 SWIO RST PDNIRST Q3v mp MSMT7731 ep H TESTA ep FL TEST3 ep ES TEST2 SD TEST 21 DSWwSESBI E DSW3 20 Dsws C7 C8 SBI si SLPTHR 20p 20p SB1 P NCTHR TP4 62 18 DIN HX z3 DIN ps SB1 EXCK HS cl EXCK L7psws 1 2 3 4 6 10 H1 12 i13 14 15 16 psw SB1 psw2 SB1 psw3 SB1 psw3 SB1 psw3 SB1 psw3 SB1 Dsws SB1 4of 7 O Oki Semiconductor MSM7731 01 Evaluation Board User s Manual Ver 2 April 1998 Figure 1 Board Schematic 2 3 3V ie LGSX LED LVFRO LPWI LOUT SB1 slide type switch SB2 snap type switch SB3 toggle type switch APWI AOUT SB4 slide type switch 5of 7 amp Oki Semiconductor Figure 1 Board Schematic 2 3 3V 3V 3V MSM7731 01 Evaluation Board User s Manual Ver 2 April 1998 3V DSW6 O EXCK 74HC04 74HC00 mcn BCLK bd CLRI vee m UA J DSW6 O DEN HFHe Tepe ET I JI ee c m Tt 3V 3V LJ LJ a CR SET mru Eu eem SW I3 T BA A2 DS y E SHE S al ilo m nd DIN C TP1 LI O 3V Go2. D y C24 FB C17 0 1u LZ 47y TP2 Cow CHS U15 78M08 U16 78M05 L4 SES C25 FB C19 O lu LE ATu V AG 6of7 e Oki Semiconductor MSM7731 01 Evaluation Board User s Manual Ver 2 April 1998 Ta om PH y v fiat EF enn acit TTT Wi TIEF y Wi E d eich HAAL 2 2 Ir L LG H iJ T FN SACH Fi MAN fet Ed 4 W ps err rT SORT ED Sl Sg w yy eni ai IU T new F 1 A m k T muu iii HH PL ad UE Mat rer TEMP eh ki H Soe x wowo Y v M i E DU ei Photo 1 Photograph of the board Top Vies 7 of 7
3. O Oki Semiconductor MSM7731 01 Evaluation Board User s Manual Ver 2 April 1998 MSM7731 01 Evaluation Board User s Manual 1 General Descriptions This is a user s manual for OKI Noise Echo Canceller MSM7731 01 The evaluation board is designed for your turn key evaluation of MSM7731 01 with the following features On board Micro Controller Interface Circuit Easy to set the internal control register without an external micro controller On board Speaker Amplifier and Microphone Input Circuit Realizes direct connection to a speaker and a microphone e Single 12V power supply For easy connection to a cigarette AC adopter of a car For the specifications and the functions of MSM7731 01 please refer to the device datasheet 2 What Consists MSM7731 01 Evaluation Kit e Evaluation Board 10 5 x 7 inch Photo 1 shows Photograph Top View of Board User s Manual this document 3 Board Schematics Figure 1 shows the schematic of the evaluation board 4 Functional Descriptions 4 1 Power Supply Single 12V power supply opeaker amplifier operates at 5V and all the other devices including MSM7731 01 operates at 3V 10f7 O Oki Semiconductor MSM7731 01 Evaluation Board User s Manual Ver 2 April 1998 4 2 Port Control Interface MSM7731 01 is designated to be set its device state either from the ports or from an MCU When evaluating MSM7731 01 with this evaluation board in port control mode you should
4. coustic side microphone input This is connected to AIN pin of MSM7731 01 RV1 is variable register control for adjusting input gain Acoustic side speaker output This is connected to on board speaker amplifier LM4861 National Semiconductor U13 LM4861 input is connected to AOUT pin of MSM7731 01 RV4 is variable register control for adjusting output gain Be careful NOT to saturate the input level of LM4861 LM4861 device is 1W and 8 ohm load performance MIN Line side analog input This is connected to LIN pin of MSM7731 01 RV2 is variable register control for adjusting input gain e MOUT Line side analog output This is connected to LOUT pin of MSM7731 01 RV5 is variable register control for adjusting output gain Note U15 are reserved for additional amplifiers 5V 4 5 Digital Interface As line side interface MSM7731 01 provides you not only digital interface but also analogue interface such as for IS 95 handsets When you like to utilize this digital line side interface provided with MSM7731 01 connect the external digital interface to TP3 SYNC BCLK PCMI PCMEI PCMO PCMEO pins of MSM7731 JUMPER JP1 and JP2 are on board pull up pull down control 0 pull down I pull up Remove JPx no pull up pull down 4 6 Clock Input On board 19 2MHz X tal is available Note XL1 is reserved for an oscillator 3 of 7 O Oki Semiconductor MSM7731 01 Evaluation Board User s Manual Ver
5. set change the device state by manipulating on board switches DSW1 DSW5 4 3 MCU Micro Controller Unit Interface MSM7731 01 is designated to be set its device state either from the ports or from an MCU When evaluating MSM7731 01 with this evaluation board in MCU control mode you can further choose whether you would utilize on board MCU or you would try an external MCU you ll prepare by yourself 4 3 1 On board MCU Control The descriptions hereunder explain the procedures for on board MCU control a On board Switches Set all of DGW6 to ON b CR WRITE e Set D7 DO SWITCH SW2 SW9 and A3 A0 SWITCH SW14 SW17 to appropriate values referring to the device datasheet set R W SWITCH SW18 to W e Set SET SWITCH SW19 ON c CR READ for reconfirmation of CR values e Set D7 DO SWITCH SW2 SW9 and A3 A0 SWITCH SW14 SW17 to appropriate values referring to the device datasheet e Set R W SWITCH SW18 to R e Set SET SWITCH SW19 ON Your set CR values are now displayed on LED2 LEDO 4 3 2 External MCU Control The descriptions hereunder explain the procedures for external MCU control a Set all of DSW6 to OFF b Connect external the port of your MCU to TP4 connected to DEN DIN DOUT EXCK pins of MSM7731 01 2of 7 O Oki Semiconductor MSM7731 01 Evaluation Board User s Manual Ver 2 April 1998 4 4 Analog Interface This board has 4 input output jacks MIC A
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