HD64F2357F20V Datasheet, PDF (683/1049 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-chip Microcomputer H8S Family / H8S/2300 Series

A₁₈ to A₀
Address stable
Address stable
CE _VIL
OE _VIL
WE
VIH
t_acc
t_acc
t_oh
t_oh
I/O₇ to I/O₀
Figure 19-57 Timing Waveforms for CE/OE Enable State Read
A₁₈ to A₀
CE
OE
WE VIH
I/O₇ to I/O₀
Address stable
t_ce
t_oe
Address stable
t_ce
t_oe
t_acc
t_acc
t_oh
t_df
t_oh ^tdf
Figure 19-58 Timing Waveforms for CE/OE Clocked Read
19.22.5 Auto-Program Mode
• In auto-program mode, 128 bytes are programmed simultaneously. For this purpose, 128 consecutive byte data
transfers should be performed.
• A 128-byte data transfer must be performed even if writing fewer than 128 bytes; in this case, H'FF data must be
written to the extra addresses.
• The lower 7 bits of the transfer address must be held low. If an invalid address is input, memory programming will be
started but a programming error will occur.
• Memory address transfer is executed in the second cycle (figure 19-59). Do not perform transfer later than 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. One or more additional programming
operations cannot be carried out on address blocks that have already been programmed.
• Confirm normal end of auto-programming by checking I/O₆. Alternatively, status read mode can also be used for this
purpose (the I/O₇ status polling pin is used to identify the end of an auto-program operation).
• Status polling I/O₆ and I/O₇ information is retained until the next command write. As long as the next command write
has not been performed, reading is possible by enabling CE and OE.
Rev.6.00 Oct.28.2004 page 653 of 1016
REJ09B0138-0600H