h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 746
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
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Section 20 ROM
I/O5–I/O0
20.11.5 Auto-Erase Mode
1. Auto-erase mode supports only entire memory erasing.
2. Do not perform a command write during auto-erasing.
3. Confirm normal end of auto-erasing by checking I/O6. Alternatively, status read mode can also
4. Status polling I/O6 and I/O7 pin information is retained until the next command write. As long
Rev. 5.00 Sep 22, 2005 page 720 of 1136
REJ09B0257-0500
A18–A0
be used for this purpose (I/O7 status polling uses the auto-erase operation end decision pin).
as the next command write has not been performed, reading is possible by enabling CE and
OE.
FWE
I/O7
I/O6
WE
OE
CE
t
pns
t
ces
t
Figure 20.22 Auto-Program Mode Timing Waveforms
f
t
ds
t
wep
H'40
t
t
ceh
r
t
dh
t
nxtc
t
as
Address
stable
t
1 to 128 bytes
ah
Data transfer
t
wsts
t
write
t
spa
H'00
Write operation end decision signal
Write normal end decision signal
t
pnh
t
nxtc
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