Kontron CP384 - Manual (Page 62)

Kontron Modular Computers GmbH ID 31440, Rev. 01
P R E L I M I N A R Y
Re
vNr. = CP384
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31440
_01 -
06
0503
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4233
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Configuration CP384
Table 4-22: ROM Control Register
BITS TYPE DEFAULT FUNCTION
31-19 r/w 0 Reserved
17-16 r/w 00 Opcode
15-8 r/w 00 Reserved
8-0 r/w 00 Internal address (A8 ... A0)
Note ...
The commands READ, EWEN (Write Enable) and WRITE are sufficient for all
purposes.
Table 4-23: Opcodes and Commands
OPCODE A8 ... A0 COMMAND
00 11xxxxxxx EWEN
10 xxxxxxxxx READ
01 xxxxxxxxx WRITE
Note ...
The EWEN (Erase and Write Enable) command must be executed once before
the first write.
Table 4-24: ROM Status Register
BITS TYPE DEFAULT FUNCTION
31 r/w 0 Busy/Ready
30-0 r/w 00 Reserved
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 4-25: ROM Data Register
BITS TYPE DEFAULT FUNCTION
31-8 r/w 0 Reserved
7-0 r/w 0 Data (for data read and write commands)