Datasheet

DS21348/DS21Q348
64 of 76
11. AC CHARACTERISTICS
Table 11-1. AC Characteristics—Multiplexed Parallel Port (BIS1 = 0, BIS0 = 0)
(V
DD
= 3.3V ± 5%, T
A
= -40°C to +85°C.) (See Figure 11-1, Figure 11-2, and Figure 11-3.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Cycle Time t
CYC
200 ns
Pulse Width, DS Low or RD
High
PW
EL
100 ns
Pulse Width, DS High or RD
Low
PW
EH
100 ns
Input Rise/Fall Times t
R
, t
F
20 ns
R/W Hold Time
t
RWH
10 ns
R/W Setup Time Before DS
High
t
RWS
50 ns
CS Setup Time Before DS,
WR, or RD Active
t
CS
20 ns
CS Hold Time
t
CH
0 ns
Read Data Hold Time t
DHR
10 50 ns
Write Data Hold Time t
DHW
0 ns
Muxed Address Valid to AS
or ALE Fall
t
ASL
15 ns
Muxed Address Hold Time t
AHL
10 ns
Delay Time DS, WR, or RD
to AS or ALE Rise
t
ASD
20 ns
Pulse Width AS or ALE
High
PW
ASH
30 ns
Delay Time, AS or ALE to
DS, WR, or RD
t
ASED
10 ns
Output Data Delay Time
from DS or RD
t
DDR
20 80 ns
Data Setup Time t
DSW
50 ns