Functional Description
CPB904
4.3.4
Reserved Flash BIOS
The CPB904 takes advantage of flash-memory based BIOS. Two Flash BIOS chips have storage
capacity of 512 KB each. The main (working) copy of BIOS occupies 512 KB on a chip in PLCC32
panel. Reserve BIOS copy is stored on a soldered chip and is used for emergency boot. Switching
to reserve BIOS copy is performed automatically.
It is possible to upgrade the main copy of BIOS in-system. It is done with the help of
fwflash.exe
program. For example:
fwflash.exe b304v1_3.bin
where
b304v1_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 b304v1_3.bin 1
where
b304v1_3.bin – BIOS image binary file name
1 – PC COM port number (COM1)
4.3.5 UIDE
Interface
CPB904 has one IDE ATA-5/ATAPI interface with support of PIO mode 0-4, MDMA mode 0-2,
UDMA mode 0-5 including UltraDMA100. It allows connection of two UDMA-100 compatible
devices (master and slave) to the primary IDE channel. External devices are connected to IDE
interface via HDD connector and CompactFlash type I/II socket located on KIB1282 carrier board.
4.3.6 NAND
Flash
Capacity of the on-board NAND flash memory chip is 64 MB. It is available only under DOS,
Windows CE, and Linux operating systems. It can be used as a bootable disk or can be disabled in
BIOS Setup. Since only one IDE channel is used, it is possible to connect storage devices in one
of the ways described below.
Connection Variant
IDE-Master
IDE-Slave
CF-Master
CF-Slave
NAND Flash
1
+
+
– – +
2
+
– – +
+
3 –
+
+
–
+
Selection of disk drives operation mode (master of slave) is performed in BIOS Setup.
4.3.7 MiniSD
Socket
CPB904 is equipped with a MiniSD socket, located on the top side of the module. It is not used in
current versions of the module.
C P B 9 0 4 U s e r M a n u a l
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