Parallel Interface Electrical Characteristics; Parallel Data Communication Timing - Texas Instruments 880 User Manual

STROBE-
ACK-
BUSY
R= 470
Q
FOR STROBE
+5V R = 1K
Q
OTHERWISE
IOH = -0.4mA
IOL = +16mA
------It>
~
74LSOO FAMILY 7400 FAMILY
ALL INPUTS ALL OUTPUTS
Figure 7-3. Parallel Interface Electrical Characteristics
~0.5",s
min.
~
I.-
0.5",s min.
1.0",smin.~
1-01
~
. . . - - -
1.0iAsmin. - - - -.....
1
U
I'"
l00nsmax.~
l00nsmax.~
U
(NOTE
l)1t=o"'smin.~
.......J
2.0/AS min. (NOTE 2)
--I
6.0",s max.
(NOTE 1) OJ'S min.
~
(NOTE 1)
_I'"
OJ'S min.
~
22226Z7-32
L
DEMAND
________
~I
_I ______
~r
NOTE1: The average timing (500",s, 10",s min., 1ooo",s max.) is for characters that do not cause the receive buffer to be full.
NOTE 2: ACK - Pulse width is 3.0",s nominal.
Figure 7-4. Parallel Data Communication Timing
7-7