Datasheet

Section 19 ROM
Rev.6.00 Sep. 27, 2007 Page 781 of 1268
REJ09B0220-0600
Table 19.17 AC Characteristics when Entering Another Mode from Memory Read 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
WE rise time t
r
— 30 ns
WE fall time t
f
— 30 ns
CE
A
18
to A
0
I/O
7
to I/O
0
OE
WE
Other mode command write
t
ceh
t
ds
t
dh
t
f
t
r
t
nxtc
Note: Do not enable WE and OE at the same time.
t
ces
t
wep
Memory read mode
Address stable
Figure 19.22 Timing Waveforms when Entering Another Mode from Memory Read Mode