Datasheet

C161S
Timing Characteristics
Data Sheet 55 V1.0, 2003-11
Data valid to WrCS t
50
CC 28 + t
C
– 2TCL - 22
+
t
C
– ns
Data hold after RdCS t
51
SR 0 – 0 – ns
Data float after RdCS
t
52
SR – 30 + t
F
– 2TCL - 20
+
t
F
ns
Address hold after
RdCS
, WrCS
t
54
CC 30 + t
F
– 2TCL - 20
+
t
F
– ns
Data hold after WrCS
t
56
CC 30 + t
F
– 2TCL - 20
+
t
F
– ns
1) These parameters refer to the latched chip select signals (CSxL). The early chip select signals (CSxE) are
specified together with the address and signal BHE
(see figures below).
Table 17 Multiplexed Bus (Reduced Supply Voltage Range) (cont’d)
(Operating Conditions apply)
ALE cycle time = 6 TCL + 2
t
A
+ t
C
+ t
F
(150 ns at 20 MHz CPU clock without waitstates)
Parameter Symbol Max. CPU Clock
= 20 MHz
Variable CPU Clock
1 / 2TCL = 1 to 20 MHz
Unit
Min. Max. Min. Max.