HD64F3039F18 Datasheet, PDF (507/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 15 ROM
FWE
A16–A0
CE
t_pns t_ces
t_ceh t_nxtc
Address stable
t_pnh
t_nxtc
OE
WE
I/O7
I/O6
I/O5–I/O0
t_f
t_wep
t_r
t_as
t_ah
t_ds
t_dh
Data transfer
1byte to 128bytes
H'40
t_wsts t_spa
t_write
Programming operation
end identification signal
Programming normal
end identification signal
H'00
Figure 15.20 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 15.20). 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.3.00 Mar. 26, 2007 Page 483 of 682
REJ09B0353-0300