Functional Description
CPB902
C P B 9 0 2 U s e r M a n u a l
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4.3
Functional Description
4.3.1
Microprocessor
The module is based on STPC Vega 180 (200) MHz microprocessor, which includes 32-bit x86 PII
core, 64-bit coprocessor and 64-bit memory bus (SDRAM). The processor also includes MAC
connected to PCI bus, the MAC is not used in the current version. Programmable I/O port
JPIO[0...7] of the processor is used for system and application purposes. The detailed description
of the microprocessor can be found in STPC Vega Programming Manual.
4.3.2
SDRAM Memory
Four SDRAM memory chips are soldered on board, two – on the top side, two – on the bottom side
of the PCB. Total memory size is 128 MB (CPB90204) or 32 MB (CPB90205).
4.3.3
Reserved Flash BIOS
The CPB902 takes advantage of flash-memory based BIOS. Flash BIOS storage capacity is
512 KB. The main (working) copy of BIOS occupies 256 KB, the rest 256 KB is used for reserve
BIOS copy. Reserve BIOS is enabled by closing pins 3-4 at the J19 pinpad.
It is possible to upgrade BIOS in system. It is done with the help of
fwflash.exe
program.
For example:
fwflash.exe b902v1_3.bin
where
b902v1_3.bin – BIOS image binary file name.
BIOS can be upgraded via RS232 (COM1) serial port in console operation mode. To do so,
connect COM ports of the module and of a remote PC, enable Start RS232 Manufacturing Link
mode in BIOS Setup, and run fwflash.exe utility at a remote PC with the following parameters:
fwflash.exe b902v1_3.bin 1
where
b902v1_3.bin – BIOS image binary file name
1 – PC COM port number (COM1)
