Auto-Erase Mode - Renesas H8S/2319 series Hardware Manual

17.11.6 Auto-Erase Mode

• Auto-erase mode supports only total memory erasing.
• Do not perform a command write during auto-erasing.
• Confirm normal end of auto-erasing by checking I/O
be used for this purpose (the I/O
operation).
• Status polling I/O
as the next command write has not been performed, reading is possible by enabling CE and
OE.
AC Characteristics
Table 17-20 AC Characteristics in Auto-Erase Mode
(Conditions: V
Item
Command write cycle
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
Status polling start time
Status polling access time
Memory erase time
WE rise time
WE fall time
Erase setup time
Erase end setup time
status polling pin is used to identify the end of an auto-erase
7
and I/O pin information is retained until the next command write. As long
6 7
= 3.3 V ±0.3 V, V
CC
Symbol
t
nxtc
t
ceh
t
ces
t
dh
t
ds
t
wep
t
ests
t
spa
t
erase
t
r
t
f
t
ens
t
enh
. Alternatively, status read mode can also
6
= 0 V, T = 25°C ±5°C)
SS a
Min Max
20 —
0 —
0 —
50 —
50 —
70 —
1 —
— 150
100 40000
— 30
— 30
100 —
100 —
Rev. 5.00, 12/03, page 603 of 1088
Unit
µs
ns
ns
ns
ns
ns
ms
ns
ms
ns
ns
ns
ns