TheTTL - Al Kossow's Bitsavers

TIBPALR19LB, TIBPALR19R4, TIBPALR19R6, TIBPALR19RB
HIGH·PERFORMANCE REGISTERED·INPUT PAL CIRCUITS
programming procedure for architectural fuses (see Notes 5 and 6)
Program:
Step 1
Step 2
Step 3
Step 4
Step 5
Apply VIL to all I/D pins and pins 1, 13 and 14; and 5 volts to the VCC pin.
Raise VCC pin to VIHH.
Raise INCLK pin to VIHH.
To program a D input pin into an I input pin, pulse the selected pin to VIHH.
Lower INCLK to VIL and VCC to 5" volts.
Verify:
Step 6
Step 7
Step 8
Step 9
Step 10
Step 11
Raise pin 13 and I/D input pins 2 thru 11 to VIHH.
Set pin 22 to Z to select pins 2 thru 11 or set pin 22 to VIHH to select pin 23.
Raise INCLK to VIHH.
To verify architectural fuses at pins 2 thru 11 lower one of these pins to VIH. When verifying
pin 23, lower pin 2 to VIH.
Clock pin 1, then lower the pin at VIH in step 9 to VIL. Clock pin 1. If pin 15 is high, fuse is
intact. If pin 15 is low, fuse is blown. Note, only the first clock is needed for pin 23.
Repeat above steps 1 thru 10 for each D input to be programmed into an I input.
programming waveforms for architectural fuses (see Note 6)
vCCvHH?------~ PROGRAM ~
5 V _ _ _ I I \~------V-E-R-IF-Y------__
I I \
I +114- II
o v I tw1 I ~ I4-t~3 I "-----
t~3~ II I I~
VIHH - - - - - - -;1 -r, I I I I
I I I I I
110 INPUTS
-in
I I I I I I I
VIL ------... 1 --+1..., I I I
td3-.l ~ td3+114-: ~ ~td3
VIHH -- - - - - II II ~r ::~ III ,.-....;....--..:...----...,.
PIN 14 (lNCLK) \
VIL t--ill-----~ ~I -----
td3-+1 I+",.--i-__ -I-__-+_____ i- I ~L
eoN ",O"V'HH-------------TI ,,,J 1"-1
VIL -------------.....ff I I I
VIHH ________ H~~':.:::'E~ PIN 23~ I ~ll4-td3
PIN 22 (LlR) I I ~
Z LOW TO SELECT PINS 2 THRU n tpd~ ~tpd
" tsu-+l i4- I I I "
PIN1(OUTCLK) VIH------------------n: n:
PIN 15 (OUTPUT)
VIL I Lf---I 1
Z
I
DON'T CARE FOR PINS 2 THRU 11 14
....
I
_I
1 --------
VOH -L-J.I---L.FUSE INTACT
VOL--~ FUSE BLOWN
DON'T CARE FOR PIN 23 14 ~I
(,)
'0,
o
...J
Q.)
:c
CO
E
E
CO
a..
C)
o
a..
c..
-6
Q)
u::
Z = high impedance (e.g., 10 k!l to 5 V).
NOTES: 5. Refer to pin assignments in operating mode when programming selected lID pins from D inputs to I inputs.
6. Pin numbers shown are for JW and NT packages only. If chip carrier socket adapter is not used, pin numbers must be changed
accordingly.
TEXAS ~
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS. TEXAS 75265
3-103