Datasheet

Section 23 ROM (H8S/2148 F-ZTAT A-Mask Version, H8S/2147 F-ZTAT A-Mask Version, H8S/2144 F-ZTAT A-Mask Version)
Rev. 4.00 Sep 27, 2006 page 722 of 1130
REJ09B0327-0400
Table 23.15 AC Characteristics in 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
Access time t
acc
— 20 µs
CE output delay time t
ce
— 150 ns
OE output delay time t
oe
— 150 ns
Output disable delay time t
df
— 100 ns
Data output hold time t
oh
5 — ns
CE
FA17 to FA0
FO7 to FO0
VIL
VIL
VIH
OE
WE
t
acc
t
acc
Address stable Address stable
Data
Data
t
oh
t
oh
Figure 23.18 Timing Waveforms for CE
CECE
CE/OE
OEOE
OE Enable State Read
CE
FA17 to FA0
FO7 to FO0
VIH
OE
WE
t
ce
t
acc
t
oe
t
oh
t
oh
t
df
t
ce
t
acc
t
oe
Address stable Address stable
Data
Data
t
df
Figure 23.19 Timing Waveforms for CE
CECE
CE/OE
OEOE
OE Clocked Read