GESBC-9302EX User`s Manual
Contents
1. 4 Connect null modem serial cable between GESBC 9302EX UART 1 and PC terminal serial port Version 0 2 Page 6 of 23 15 May 07 GESBC 9302EX User s Manual 5 Launch a terminal emulator such as HyperTerminal or minicom on the PC configured to connect to the serial port of the GESBC 9302EX Configure the serial port with the following parameters 57600 bits per second 8 data bits no parity 1 stop bit no flow control 6 Connect the board to a local area network optional Operation The startup procedure for the GESBC 9302EX is straightforward First the connection of the power harness is required Second the null modem serial interface cable must be connected to the UART1 connector Third connect the GESBC 9302EX to a network that has Internet access It is recommended that all other cables be tested to determine they are properly seated A few seconds after applying power to the GESBC 9302EX debug information will be displayed on the terminal program The following figure shows what this should look like ioj xi File Edit view Call Transfer Help Dl alal Hlal USB hub found 3 ports detected Initializing USB Mass Storage driver usb c registered new driver usb storage USB Mass Storage support registered NET amp Linux TCP IP 1 0 for NET4 0 IP Protocols ICMP UDP TCP IP routing cache hash table of 512 buckets 4Kbytes TCP Hash tables configured established 2048 bind 4096 NET amp Unix domain sockets 12. 0 2 Page 18 of 23 15 May 07 GESBC 9302EX User e Manual Load Root File System The default configuration of GESBC 9302EX is using part of SDRAM as RAM disk for Linux root file system The ramdisk image must be stored in the on board FLASH memory and loaded by Redboot for the Linux kernel The image must be loaded into dynamic memory before it can be stored in the on board FLASH memory To load the ramdisk file to SDRAM enter the following commands at the terminal console load v r b 0x800000 h tftp_host_ip ramdisk_file_name where v verbose r binary format b base address in memory for serial port download the command is load v r b 0x800000 m ymodem Immediately after entered the above serial download command start Y Modem transfer on the terminal program the download process should start The above commands will load ramdisk file into on board SDRAM To store the image into non volatile FLASH memory use the following command fis create b 0x800000 1 lt ramdisk_file_length gt ramdisk_file_name where b is the memory base address l is the ramdisk size It can be calculated by subtracting the end address from the base address from the Redboot response when loading the ramdisk file The ramdisk_file_name can be any arbitrary name To verify the image has been stored correctly in the FLASH memory use the following command fis list Load Linux Kernel The kernel image must be loaded into d
3. elle laude GESBC 9302E X User s M anual Embedded Single Board Computer GESBC 9302EX User e Manual Table of Contents Chapter 1 Introducing the GESBC 9302EX Single Board Computer 4 GESBC 9302EX e tata 4 Adya ced e A cecaidast EES ESEE 4 ei EAR 5 SDRAM EE 5 eene 6 MS EE 6 CARTA TA AA A 6 A A A ae ane aseoa eee nee Mees 6 at EE 6 Chapter 2 Getting Started versidad 6 Assembly and Connect da 6 KEES ege 7 EE 8 Chapter 3 GESBC 9302EX Function Blocks AAA 9 TPO iy Sx AO 9 SPRAM is da 10 S KEE 11 A eegen chen ee 11 UART I mitra an 11 Ethernet E 12 lk 12 OC A D LS A A AAA AE AE AS AA AAA A 12 A E 13 External Real Time Clock and Battery Hook up 14 Expansion BUS as 14 Power Requirements dat 15 Chapter 4 Software Description ista releer oie iii e 16 O eaaa Sa SEIE 16 GESBC 9302EX Linux Code pinar 16 Download Utilidad 16 RCC DOO O Ee 17 Loading Linux Kernel and root File System 17 Chapter 5 Development Tools iii is 20 A O 20 Linux Development Tool Chi srt cielos 20 Native Application Development Over NR 22 Chapter 6 Kee Oe 23 Version 0 2 Page 2 of 23 15 May 07 GESBC 9302EX User e Manual List of Tables Table 1 System configuration 1 ee 8 Table 2 E Ree 11 Tabl 3 JP6 EE En EE 12 Table 4 J11 SPlcommect0r gedeien AER ea nsii 12 Table 5 J3 On chip A D converter 312s aras 12 Table 6 J1 GPIO Eu 13 Table 7 J2 GPIO EE 13 Table 8 J5 Real Time Clock battery back Up Compector ee eeeeeeeseeeeeee
4. operating clock rate of 200MHz and a power usage between 100mW and 750mW dependent upon clock speed The ARM core operates from a 1 8V supply while the I O operates at 3 3V The low power consumption makes it an idea platform for battery operated applications A high performance 1 10 100 Mbps Ethernet Media Access Controller EMAC is included along with external interfaces to SPI and I2S Audio A two port USB host and two UARTs are included as well The list below summarizes the features of the GESBC 9302EX 200MHz Processor Core ARM920T with MMU MaverickCrunch Math Engine MaverickKey Security 32M SDRAM 4 16M NOR FLASH 128 MB 1GB NAND FLASH Ethernet Media Access Controller EMAC 5 channel 12 bit Analog to Digital Converter ADC Universal Asynchronous Receiver Transmitters UARTs 2 USB Host Port Version 0 2 Page 4 of 23 15 May 07 GESBC 9302EX User s Manual e External Real Time Clock with backup battery hook up Figure 1 below show a picture of the GESBC 9302EX Single Board Computer TESES Si f y ANNO nn eh eth A Wi tut ee e DOLL DO Ae ok wb Figure 1 GESBC 9302E X Single Board Computer EP9302 The GESBC 9302EX is shipped with the Cirrus Logic EP9302 processor For more information regarding the EP9302 processor please see the EP9302 datasheet SDRAM The GESBC 9302EX is shipped with 32MBytes of SDRAM Version 0 2 Page 5 of 23 15 May 07 GESBC 9302EX User e Manua
5. up GESBC 9302EX and press CTRL C at the terminal connected to the GESBC 9302EX to stop the default redboot boot script Load the on board kernel image from FLASH memory fis load zlmage 5 Start the Linux operating system by typing exec c root dev nfs nfsroot lt server IP address gt lt NFS directory gt ip dhcp console ttyAM 0 The system is now ready to use for application development Version 0 2 Page 22 of 23 15 May 07 GESBC 9302EX User e Manual Chapter 6 Troubleshooting This chapter provides Troubleshooting information Search the entries in the Problem column in order to find the item that best describes your situation Then perform the corrective action in the same row If the problem persists contact Glomation Version 0 2 Page 23 of 23 15 May 07
6. 0 2 Page 12 of 23 15 May 07 GESBC 9302EX User e Manual 6 Channel 3 7 Channel 4 8 GND 9 GND 10 Channel 5 GPIO The GESBC 9302EX Single Board Computer provides 20 general purpose I O signals for external use The signal designation is listed in the following tables Table 6J1GPIO 1 connector Signal Name Pin Number Signal Name 1 EGPIO8 2 EGPIO9 3 EGPIO10 4 EGPIO11 5 EGPIO12 6 EGPIO13 7 EGPIO14 8 EGPIO15 9 GPIOO CGPIO O 10 GPIO1 HGPIO S EN GPIO2 HGPIO 4 12 GPIO3 HGPIO 3 13 GPIO4 HGPIO 2 14 GPIOS FGPIO 1 15 GPIO6 FGPIO 2 16 GPIO7 FGPIO 3 17 GND 18 GND 19 VDD3 3 20 VDD3 3 The GPIO3 and GPIO4 are used for optional A D and D A chip select when they are installed Table 7 J 2GPIO 2 connector a ae EGPIO2 EGPIO3 E EGPIO4 k EGPIO5 5 GND 6 VDD3 3 EGPIO 8 15 are connected directly to Port B of EP9302 CPU EGPIO 2 5 are connected directly to Port A of EP9302 CPU The GPIO 0 is mapped to Port C of EP9302 CPU The GPIO 1 4 are mapped to Port H of EP9302 CPU which must be enabled in the DeviceCFG register at address 0x8093_0080 The GPIO 5 7 are mapped to EP9302 port F The EP9301 02 user guide does not provide clear documentation on the bit for port H Please refer to page 145 of EP9315 user guide for Port H configuration bit Version 0 2 Page 13 of 23 15 May 07 GESBC 930
7. 0 SMP for Linux HEI 8 NetWinder Floating Point Emulator V0 9 double precision RAMDISK Compressed image found at block 8 length error lt 6 gt Freeing initrd memory 6144K VFS Mounted root ext2 filesystem Freeing init memory 44K init started Gen v1 00 2005 07 19 12 30 0000 multi call binary Please press Enter to activate this console BusyBox v1 00 2005 07 19 12 30 0000 Built in shell ash Enter help for a list of built in commands Be y connected 0 02 23 Gu Soen ex SCROLL CAPS Wm capture ost echo p Please see Chapter 4 Software Description for more details regarding the software functionality Version 0 2 Page 7 of 23 15 May 07 GESBC 9302EX User e Manual Configurations Jumpers are used to configure the GESBC 9302EX to operate in different mode The following table lists all the settings for each jumper Table 1 System configuration A Boot mode connect pin 1 and 2 serial boot connect pin 2 and 3 flash boot Sw1 Reset switch header LED3 Power indicator LED header Version 0 2 Page 8 of 23 15 May 07 GESBC 9302EX User e Manual Chapter 3 GESBC 9302EX Function Blocks EP9302 The GESBC 9302EX Single Board Computer uses the Cirrus Logic EP9302 as the core processor on this development board The top level features of EP9302 processor are the following ARM920T RISC Core Processor 200 MHz 200 MIPS Performance 16 Kbyte Instruction Cache 16 Kb
8. 2 Page 15 of 23 15 May 07 GESBC 9302EX User e Manual Chapter 4 Software Description Overview This chapter provides information regarding the software that is shipped with the GESBC 9302EX Board The software included with the board is Linux with a few test applications and network utilities The Linux software provides the user with the ability to test some of the subsystems on the GESBC 9302EX board The download utility provides a means to program a binary image into the flash memory on the GESBC 9302EX GESBC 9302EX Linux Code The pre programmed software provides the user with the opportunity to test some of the subsystems on the GESBC 9302EX via Linux This software is programmed into the system FLASH located on the board prior to shipment The binary image of the shipped code is included on the CD that ships with the board Serial Port Interface The functionality of the serial interface can be demonstrated by looking at the debug messages while the system boot ups and operates The setting for the serial interface is described in chapter 2 USB Interface The functionality of the USB interface can be shown by hooking up a user supplied USB device Ethernet Interface Ethernet is automatically detected by the Linux kernel and a DHCP client will try to lease network address from connected DHCP server Download Utility The download utility provides the user with a tool for programming the flash memory on the GESBC 9302E
9. 20T RISC processing core is supported through various toolsets available from third party suppliers The typical toolset required for the code development is a compiler assembler linker and a source level code debugger Linux Development Tool Chain The Linux development tool chain is included in the CD ROM come with the GESBC 9302EX board A host PC running Linux operating system is required to run the development tools This guide assumes user had basic Linux or Unix application development knowledge Version 0 2 Page 20 of 23 15 May 07 GESBC 9302EX User e Manual Host Computer Requirement The host PC should run Redhead SuSe or other Linux distribution a RS 232 serial port at least 500MB free disk space and a terminal program such as minicom Hardware Connection A null modem cable is required to connect GESBC 9302EX to the host computer Install Linux Development Tool Chain The ARM Linux Development Tool chain can be installed in any directory on the host system The following example uses usr local arm as the installing directory for the ARM Linux Development Tool Chain 1 Create the tool chain directory and untar the tool chain cd usr local mkdir arm cd arm tar jxvf cdrom cross 3 3 tar bz Your mounting point of CD ROM maybe different 2 Set up the directory path variable export PATH usr local arm 3 3 bin SPATH The above command can be included in the shell resource file so it is executed every time you login
10. 2EX User e Manual External Real Time Clock and Battery Hook up The GESBC 9302EX Single Board Computer provides an external real time clock with battery backup hook up The DS1337 1339 connects to EP9302 via EEDAT and EECLK pin The RTC also provides 32 768 KHz square wave for EP9302 RTC circuit The square wave output frequency of external RTC should not be altered to ensure proper system functioning The signal designation of the battery hook up is listed in the following tables Table 8 J 5 Real Time Clock battery back up connector Pin Number Signal Name 1 3 3V 2 GND Expansion Bus The GESBC 9302EX Single Board Computer provides a memory expansion bus to connect additional memory mapped devices Table 9 J 10 Expansion Bus 1 DO 2 DI 3 D2 4 D3 5 D4 6 D5 7 D6 8 D7 9 D8 10 D9 Mm D10 12 Dil 13 D12 14 D13 15 D14 16 D15 17 AO 18 Al 19 A2 20 A3 21 A4 22 A5 23 A6 24 A7 E A8 26 A9 27 A10 28 All 29 A12 30 A13 31 Al4 ES A15 33 A16 34 Al7 35 A18 36 A19 37 A20 38 A21 39 A22 40 A23 41 A24 42 A25 43 RDN 44 WRN 45 WAITN 46 RESETN 47 CSON 48 CS7N Version 0 2 Page 14 of 23 15 May 07 GESBC 9302EX User e Manual 49 GND 50 GND Power Requirement The GESBC 9302EX Single Board Computer requires regulated 5v DC Table 10 J 7 Power supply connector 2 GND Version 0
11. 64ms Refresh Period Version 0 2 Page 10 of 23 15 May 07 GESBC 9302EX User e Manual FLASH As previously stated the EP9302 features an unified memory address architecture The EP9302 can support either NAND or NOR types of non volatile flash memory for program code storage The GESBC 9302EX is shipped with 4 Mbytes of NOR FLASH memory which is provided by Intel E28F320J3A Strata FLASH memory device and 128MB NAND type FLASH The Intel Strata Flash memory device features include the following e 150ns Initial Access Speed e 25 ns Asynchronous Page Mode Reads e 32 Byte Write Buffer e Program and Erase Suspend Support e Flash Data Integrator Common Flash Interface Compatible e 128 bit Protection Register e 64 Bit Unique Device Identifier e 64 Bit User Programmable OTP Cells e Absolute Protection with VPEN Tied to Ground e Individual Block Locking e High Density 32 Kbyte Blocks USB The GESBC 9302EX Single Board Computer provides two USB host connections The EP9302 USB host controller is configured for two root hub ports and features an integrated transceiver for each port The EP9302 integrates two USB 2 0 Full Speed host ports These ports are fully compliant to the OHCI USB 2 0 Full Speed specification 12 Mbps The controller complies with the OHCI specification for USB Revision 1 1 The USB ports are brought out by a standard double deck USB type A connector UART 1 and 2 The GESBC 9302EX Single Board Computer is ship
12. For bash shell a good place to put is in bashre in your home directory Compile Linux Kernel The GESBC 9302EX is shipped with Linux kernel version 2 6 18 The pre patched kernel source tree is included in the companion CD ROM Prepare Linux Kernel source Untar the Linux kernel Configure Linux Kernel In the Linux kernel directory executing the following commands Version 0 2 Page 21 of 23 15 May 07 GESBC 9302EX User e Manual make ARCH arm CROSS_COMPILE arm linux menuconfig If problem occurs make sure the default PATH variable is set to the correct tool chain directory Compile Kernel Once Linux kernel has been configured it can be compiled using following commands make or make zImage The Linux kernel should compile without error and the image file will be created Native Application Development Over NFS The network file system NFS can be used to do native kernel application development The include Debian based file system contains native compiler debugger for ARM processor and many other utilities for fast application development The following steps outline the general procedure of mounting NSF on GESBC 9302EX board 1 Create a directory on server computer to house the file system for GESBC 9302EX 2 Unpack the included file system zip file in the newly created directory tar jxf lt you CD ROM path gt debian arm cirrus tar bz2 3 Change the NFS server configuration to include the directory 4 Power
13. X with a binary image The following procedure will allow in circuit programming of the flash memory via the EP9302 processor 1 Power the board off 2 Connect null modem serial cable to UART1 3 Set jumper 2 to connect pin 1 and 2 JP2 factory default is pin 2 and 3 4 Stop any program that might use the serial port that is connected to GESBC 9302EX 5 Run download utility assuming download_win exe located in same directory as binary image download_win binary_image_filename bin Version 0 2 Page 16 of 23 15 May 07 GESBC 9302EX User e Manual 6 Waiting for board to wake up message is displayed 7 Power the board on 8 Messages displayed regarding erasing then programming the flash 9 Successfully programmed binary_image_filename bin message displayed upon programming completion 10 Power the board off 11 Install jumper on pin 2 and 3 of JP2 12 Power the board on Redboot RedBoot provides a simple interface for loading operating systems and applications onto the GESBC 9302EX board It can also serve as a debug platform for standalone programs using the GDB stub that is built into RedBoot RedBoot uses a serial console for its input and output The default serial port setting is 57600 8 N 1 It also supports the built in Ethernet port and a flash file system and general flash programming The board is shipped with Redboot pre installed Please refer to Download Utility section for instructio
14. l FLASH The GESBC 9302EX is shipped with 4MBytes of asynchronous Intel Strata Flash and 128MB NAND FLASH USB The GESBC 9302EX is shipped with two USB host connections UART 1 The GESBC 9302EX is shipped with a 9 pin interface UART 2 The GESBC 9302EX is shipped with the 3 wire UART 2 interface Ethernet The GESBC 9302EX is shipped with a complete physical and MAC subsystem that is compliant with the ISO TEC 802 3 topology for a single shared medium with several stations Chapter 2 Getting Started This chapter describes the GESBC 9302EX working environment and familiarizes the user with its components and functionality This chapter contains the following sections e Assembly and Connections o Describes how to assemble and connect components to the GESBC 9302EX Single Board Computer e Operation o Describes how to operate the GESBC 9302EX Single Board Computer Assembly and Connections In order to use the GESBC 9302EX the user must first assemble and connect the peripherals to the GESBC 9302EX as described in the following procedure 1 Place the GESBC 9302EX on a static free surface 2 Make sure all of the jumpers are in the factory default position The unit is shipped in a factory default configuration If the user is uncertain that the GESBC 9302EX has the jumpers in the factory default configuration please see the next section regarding board configuration 3 Connect 5V regulated power supply to the board
15. ns to reload Redboot Please refer to documents at ECOS website http ecos sourceware org regarding how to rebuild Redboot Loading Linux Kernel and root File System The Redboot boot loader provides two ways to load Linux kernel and file system into FLASH memory by Ethernet network and TFTP server or serial connection The network connection method provides fast loading but if not available serial port connection method can be used After power on the GESBC 9302EX board the following message should be shown on the terminal console on the host PC connected to the GESBC 9302EX board FLASH configuration checksum error or invalid key EP93xx no EEPROM static ESA or RedBoot config option No network interf faces found ROMRAM 07 39 29 Dec RedBoot tm bootstrap and debug environmeni Non certified release version v2_0 built 18 2004 Platform Cirrus Logic EDB9301 Board ARM920T Rev A Copyright C 2000 2001 2002 Red Hat Inc A slightly different message will be displayed if the FLASH memory has been initialized and programmed before Version 0 2 Page 17 of 23 15 May 07 GESBC 9302EX User e Manual RAM 0x00000000 0x04000000 available FLASH 0x60000000 0x60400000 16 blocks of 0x00040000 bytes each RedBoot gt It s possible to use bootp of Redboot to acquire network address automatically For situation it is not available the f
16. ollowing procedure can be used to configure a static IP address for the SBC RedBoot gt fconfig Run script at boot true Boot script Enter script terminate with empty line gt gt fis load ramdisk gt gt fis load zImage gt gt exec r 0x800000 s 0x300000 gt gt Boot script timeout 1000ms resolution 1 Use BOOTP for network configuration false Gateway IP address Local IP address 192 168 0 112 Local IP address mask Default server IP address DNS server IP address Set eth0 network hardware address MAC true eth0 network hardware address MAC 0x00 0x00 0x00 0x00 0x80 0x21 GDB connection port 9000 Force console for special debug messages false Network debug at boot time false Update RedBoot non volatile configuration continue y n y Erase from 0x60780000 0x60781000 Program from 0x03fbe000 0x03fbf000 at 0x60780000 RedBoot gt The Redboot FLASH file system must be initialized in order to store data in the FLASH file system The following procedure is used to initialize the Redboot FIS RedBoot gt fis init About to initialize format FLASH image system continue y n y Initialize FLASH Image System Warning device contents not erased some blocks may not be usable Erase from 0x607c0000 0x60800000 Program from 0x03fbf000 0x03fff000 at 0x607c0000 RedBoot gt Version
17. ped with 2 3 wire UART interface The UART 1 interface is provided via a standard DB 9 connector The signal designation is listed in the following tables Table 2 P1 UART1 connector 1 DC 2 DC JI RS 13 TX 4 DTR 5 GND 6 DSR Version 0 2 Page 11 of 23 15 May 07 GESBC 9302EX User e Manual 7 RTS 8 CTS 9 RNA _Table3 J P6 UART2 connector Pin Number Signal Kan 1 RX 2 TX 3 GND Ethernet The GESBC 9302EX Single Board Computer is shipped with support for a complete Ethernet interface The EP9302 contains a MAC subsystem that is compliant with the ISO TEC 802 3 topology for a single shared medium with several stations The Media Access Controller MAC within the EP9302 supports 1 10 100 Mbps transfer rates and interfaces to industry standard physical layer devices SPI bus The GESBC 9302EX Single Board Computer is shipped with a SPI expansion bus header for peripheral expansion The signal designation is listed in the following table Table 4 J 11 SPI connector Pin Number Signal Name 1 SFRM 2 SSPRX 3 GND 4 SCLK 5 GND 6 SSPTX On chip A D The GESBC 9302EX Single Board Computer is shipped with a 5 channel 12 bit on chip A D converter The signal designation is listed in the following table Table 5 J 3 On chip A D converter Pin Number Signal Name EI GND E Channel 1 3 Channel 2 4 GND E GND Version
18. steeeeeeteeees 14 Table RU Expansion EE 14 Table 10 37 Power supply COME id tds 15 Version 0 2 Page 3 of 23 15 May 07 GESBC 9302EX User e Manual Chapter 1 Introducing the GESBC 9302EX Single Board Computer GESBC 9302EX Overview The GESBC 9302EX a low cost compact sized single board computer based on Cirrus Logic EP9302 processor With a large peripheral set targeted to a variety of applications the GESBC 9302EX is well suited for industrial controls digital media servers audio jukeboxes thin clients set top boxes point of sale terminals biometric security systems and GPS devices will benefit from the EP9302 s integrated architecture and advanced features Advanced Features The heart of the GESBC 9302EX is the EP9302 which is the one in a series of ARM920T based processors The ARM920T microprocessor core with separate 16 Kbyte 64 way set associative instruction and data caches is augmented by the MaverickCrunch co processor This enables faster than real time compression of audio CDs The proprietary MaverickKey unique hardware programmed IDs provide an excellent solution to the growing concern over secure Web content and commerce MaverickKey IDs can also be used by OEMs and design houses to protect against design piracy by presetting ranges for unique IDs The EP9302 is a high performance low power RISC based device built around a single ARM920T microprocessor core The ARM920T on the EP9302 functions with a maximum
19. ynamic memory before it can be stored in the on board FLASH memory To load Linux kernel issue the following command at the terminal console connected to the GESBC 9302EX board The host computer should have tfpt server running and Linux kernel and file system file stored in the tftp root directory Version 0 2 Page 19 of 23 15 May 07 GESBC 9302EX User e Manual load v r b 0x80000 h host_ip_address kernel_image_name where y verbose r binary format b base address in memory The above command will load Linux kernel image file into on board SDRAM To store the image into non volatile FLASH memory use the following command fis create b 0x80000 1 lt kernel_image_length gt kernel_image_name where b is the memory base address l is the kernel image size It can be calculated by subtracting the end address from the base address from the Redboot response when loading the kernel image file The kernel_image_name can be any arbitrary name To verify the image has been stored correctly in the FLASH memory use the following command fis list Multiple kernel images or root file systems can be stored in the on board FLASH memory when memory space permits Chapter 5 Development Tools Overview This chapter provides a brief introduction to development tools that are available for the EP9302 System on a Chip processor The central processing core on the EP9302 is a 200 MHz ARM920T processor The ARM9
20. yte Data Cache Linux and Windows CE enabled MMU o Note Cirrus Logic to supply either a Linux port or a Windows CE port including the respective board support package BSP 100 MHz System Bus MaverickCrunch Math Engine MaverickKey Security Features 16 bit SDRAM Interface Up To 4 Banks 16 bit SRAM FLASH ROM Interface Serial EEPROM Interface 10 100 Mbps Ethernet MAC Two UARTs Two port USB Host 5 channel 12 bit ADC SPI Port Serial Audio Interface JTAG Interface More detailed information regarding the EP9302 processor can be found at wWww cirrus com and on the enclosed disk Version 0 2 Page 9 of 23 15 May 07 GESBC 9302EX User e Manual SDRAM The EP9302 features a unified memory address model where all memory devices are accessed over a common address and data bus The EP9302 can support a minimum of 1 to a maximum of 4 banks of 32 bit 66 or 100 MHz SDRAM Additionally the GESBC 9302EX supports 32 SDRAM density The K4556132 SDRAM manufactured by Samsung is a part that matches this requirement The features of the Samsung SDRAM include the following e JEDEC Standard 3 3V Power Supply e LVTTL Compatible with Multiplexed Address e 4 Bank Operation e MRS Cycle with Address Key Programs e CAS Latency of 2 Or 3 e Burst Length of 1 2 4 8 and Full Page e Burst Type of Sequential and Interleave e All Inputs Are Sampled on Rising Edge of Clock e DQM for Masking e Auto and Self Refresh e
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