Renesas ZTAT H8S/2357F, Hardware Manual

Page: 640 / 1047

Rev.6.00 Oct.28.2004 page 612 of 1016
REJ09B0138-0600H
•
The status polling I/O
6
and I/O
7
pin information is retained until the next command write. Until the next command
write is performed, reading is possible by enabling
CE
and
OE
.
19.13.7 Status Read Mode
•
Status read mode is used to identify what type of abnormal end has occurred. Use this mode when an abnormal end
occurs in auto-program mode or auto-erase mode.
•
The return code is retained until a command write for other than status read mode is performed.
Table 19-26 AC Characteristics in Status Read Mode
Conditions: V
CC
= 5.0 V
±
10%, V
SS
= 0 V, T
a
= 25
°
C
±
5
°
C
Item Symbol Min Max Unit
Command write cycle t
nxtc
20 —
µ
s
CE
hold time t
ceh
0 — ns
CE
setup time t
ces
0 — ns
Data hold time t
dh
50 — ns
Data setup time t
ds
50 — ns
Write pulse width t
wep
70 — ns
OE
output delay time t
oe
— 150 ns
Disable delay time t
df
— 100 ns
CE
output delay time t
ce
— 150 ns
WE
rise time t
r
— 30 ns
WE
fall time t
f
— 30 ns
CE
Address
Data
OE
WE
t
ces
t
nxtc
t
nxtc
t
df
Note: I/O
2
and I/O
3
are undefined.
t
ces
t
dh
t
wep
t
wep
Data
t
dh
t
oe
t
ce
t
nxtc
H'71
t
f
t
r
t
f
t
r
t
ceh
t
ds
t
ds
H'71
t
ceh
Figure 19-31 Status Read Mode Timing Waveforms