TheTTL - Al Kossow's Bitsavers

TIB82S167B
14 x 48 x 6 FIELD-PROGRAMMABLE LOGIC SEOUENCER
WITH 3-STATE OUTPUTS OR PRESET
diagnostics
A diagnostics mode is provided with these devices that allows the user to inspect the contents of the
state register. When 10 (pin 9) is held at 10 V, the state register bits P2-P7 will appear at the 00-03 and
PO-P1 outputs. The contents of the registers, 00-03, and PO-P1 remain unchanged.
diagnostics waveforms
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INTERNAL
STATE REGISTER
~------------------------------------------------------VIH
11-113-.ft\
1 -----------------------------------------Vll
I
., r------""\-- - - - - ----+10V
1 -I- ~8.0V
,....
--------------~II I~~---------------
10 ~ .(.' , I '\ VIH
elK
I 'I 1 I ' Vil
I I+----th ---+I 1
, 1 1
: I I,,\-------r---------:'H
I I I Il
t4--t su ~14 tw~ I
I 1 I
PS
P2-P7 - - - -- -
QO-Q3. PO-P1 -------Qn------~: ------,.>K Qn + 1 X
OPTIONAL
OE
PS = Present State
NS = Next State
"I -- y- T - ~S- - - 1 - - - - - - -VOH
~ - '""""- -+ - - - - - --t - - ~ - - - - VOL
: l k--tpd----+J I4---- t pd4
NS
~ ~OH
1 1 VOL
\4-tpd-+l
------------------------------------------------0 V
3-146
TEXAS -I/}
INSTRUMENTS
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