Renesas H8/3067 Series User Manual page 676

Section 18 ROM
FWE
A16-0
t
t
pns
ces
CE
OE
tf
WE
I/O7
I/O6
I/O5-0
Figure 18.20 Auto-Program Mode Timing Waveforms
Cautions on Use of Auto-Program Mode
• In auto-program mode, 128 bytes are programmed simultaneously. This should be carried out
by executing 128 consecutive byte transfers.
• A 128-byte data transfer is necessary even when programming fewer than 128 bytes. In this
case, H'FF data must be written to the extra addresses.
• If a value other than an effective address is input, processing will switch to a memory write
operation but a write error will be flagged.
• Memory address transfer is performed in the second cycle (figure 18.20). Do not perform
transfer after the second cycle.
• Do not perform a command write during a programming operation.
• Perform one auto-programming operation for a 128-byte block for each address.
Characteristics are not guaranteed for two or more programming operations.
• Confirm normal end of auto-programming by checking I/O 6. Alternatively, status read mode
can also be used for this purpose.
Rev. 4.00 Jan 26, 2006 page 652 of 938
REJ09B0276-0400
ADDRESS STABLE
t
t
nxtc
ceh
t
wep t
as
tr
t t
ds dh
H'40
t
t
ah
wsts
Data transfer
1byte to 128bytes
t
pnh
t
nxtc
t
spa
t
write
Programming operation
end identification signal
Programming normal
end identification signal
H'00