Datasheet

Section 19 ROM
Rev.6.00 Sep. 27, 2007 Page 784 of 1268
REJ09B0220-0600
AC Characteristics
Table 19.19 AC Characteristics in Auto-Program Mode
Conditions: V
CC
= 3.3 V ±0.3 V, V
SS
= 0 V, T
a
= 25°C ±5°C
Item Symbol Min Max Unit
Command write cycle t
nxtc
20 — µs
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
Status polling start time t
wsts
1 — ms
Status polling access time t
spa
— 150 ns
Address setup time t
as
0 — ns
Address hold time t
ah
60 — ns
Memory write time t
write
1 3000 ms
WE rise time t
r
— 30 ns
WE fall time t
f
— 30 ns
Address stable
CE
A
18
to A
0
I/O
5
to I/O
0
I/O
6
I/O
7
OE
WE
t
as
t
ah
t
dh
t
ds
t
f
t
r
t
wep
t
wsts
t
write
t
spa
t
nxtc
t
nxtc
t
ceh
t
ces
Programming operation
end identification signal
Data transfer
1 byte to 128 bytes
H'40
H'00
Programming normal
end identification signal
Figure 19.25 Auto-Program Mode Timing Waveforms