Kontron CP372 - Manual (Page 58)

Configuration CP372
Page 4 - 12 © 2002 Kontron Modular Computers GmbH ID 25780, Rev. 01
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P R E L I M I N A R Y
Note: The Startbit will automatically be reset as soon as an action is completed.
Note: The commands READ, EWEN (write enable) and WRITE are sufficient for all
purposes.
Note: The EWEN (Erase and Write enable) command must be executed once before the first
write.
Note: As soon as the Startbit is set the Busy/Ready bit becomes active (Busy=1). It remains set
as long as the command is executed and is reset when command execution is complete.
Table 4-5: ROM Command Register Bit Map
BITS TYPE DEFAULT FUNCTION
31 R/W 0 Startbit
30 - 0 R/W 00 reserved
Table 4-6: ROM Control Register Bit Map
BITS TYPE DEFAULT FUNCTION
31 - 18 R/W 0 reserved
17 - 16 R/W 00 Opcode
15 - 9 R/W 00 reserved
8 - 0 R/W 00 internal address (A8..A0)
Table 4-7: Opcodes and Commands
OPCODE A8 … A0 COMMAND
00 11xxxxxxx EWEN
10 xxxxxxxxx READ
01 xxxxxxxxx WRITE
Table 4-8: ROM Status Register Bit Map
BITS TYPE DEFAULT FUNCTION
31 R/W 0 Busy
30 - 0 R/W 00 reserved