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6. ROM
Table 6.11 Writer Mode Commands
Command Name
Memory read mode
Auto-program mode
Auto-erase mode
Status read mode
Legend:
RA:
Read address
WA: Programming address
Dout: Read data
Din: Programming data
Notes: 1. In auto-program mode, 129 cycles are required for command writing by means of a
simultaneous 128-byte write.
2. In memory read mode, the number of cycles depends on the number of address write
cycles (n).
6.8.4
Memory Read Mode
1. After the end of an auto-program, auto-erase, or status read operation, the command wait state
is entered. To read memory contents, a transition must be made to memory read mode by
means of a command write before the read is executed.
2. Command writes can be performed in memory read mode, just as in the command wait state.
3. Once memory read mode has been entered, consecutive reads can be performed.
4. After power-on, memory read mode is entered.
5. Do not make a setting outside the valid address range.
Rev.3.00 Jul. 19, 2007 page 154 of 532
REJ09B0397-0300
Number of
Cycles
Mode
1 + n
write
129
write
2
write
3
write
1st Cycle
Address
Data
X
H'00
X
H'40
X
H'20
X
H'71
2nd Cycle
Mode
Address
read
RA
write
WA
write
X
write
X
Data
Dout
Din
H'20
H'71
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