hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 226

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 6 ROM
6.10.5
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
5. Table 6.18 shows the AC characteristics.
Table 6.18 AC Characteristics in Auto-Erase Mode
Conditions: V
Rev. 7.00 Mar 10, 2005 page 184 of 652
REJ09B0042-0700
Item
Command write cycle
C E
C E
Data hold time
Data setup time
Write pulse width
Status polling start time
Status polling access time
Memory erase time
W E
W E
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
O E
hold time
setup time
rise time
fall time
.
Auto-Erase Mode
CC
= 3.3 V ±0.3 V, V
SS
Symbol
t
t
t
t
t
t
t
t
t
t
t
nxtc
ceh
ces
dh
ds
wep
ests
spa
erase
r
f
= 0 V, T
a
= 25°C ±5°C
Min
20
0
0
50
50
70
1
—
100
—
—
Max
—
—
—
—
—
—
—
150
40000
30
30
Unit
µs
ns
ns
ns
ns
ns
ms
ns
ms
ns
ns
Notes
Figure 6.18
C E
and