Configuration cp384 – Kontron CP384 User Manual
Page 62
Kontron Modular Computers GmbH
ID 31440, Rev. 01
P R E L I M I N A R Y
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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)