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TMP92CM22
2007-02-16
92CM22-222
4.2.2 Page ROM Read Cycle
(1) 3-2-2-2 mode
Vcc = 3.3 ± 0.3 V/fc = 4 to 40 MHz/Ta = −40 to 85°C
No.
Parameter Symbol Min Max
f
SYS
=
20 MHz
(fc = 40 MHz)
f
SYS
=
125 kHz
(fc = 4 MHz)
Unit
1 System clock period ( = T) t
CYC
50 8000 50 8000 ns
2 A0, A1 → D0 to D31 input t
AD2
2.0T − 50 50 15950 ns
3 A2 to A23 → D0 to D31 input t
AD3
3.0T − 50 100 23950 ns
4 RD falling → D0 to D31 input t
RD3
2.5T − 45 80 19955 ns
5 A0 to A23 invalid → D0 to D31 hold t
HA
0 0 0 ns
6
RD
rising → D0 to D31 hold t
HR
0 0 0 ns
AC condition
• Output: High = 0.7 Vcc, Low = 0.3 Vcc, C
L
= 50 pF
• Input: High = 0.9 Vcc, Low = 0.1 Vcc
(2) Page ROM read cycle (3-2-2-2 mode)
t
H
A
Data
in
p
ut
Data
in
p
ut
Data
in
p
ut
Data
input
t
CYC
A
0 to
A
23
CLKOUT
D0 to D31
RD
CS2
+0
+
1
+
2 +3
t
AD3
t
AD2
t
AD2
t
AD2
t
HR
t
H
A
t
H
A
t
H
A
t
AD3