Intel UPI-C42 Computer Hardware User Manual


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UPI-C42UPI-L42
AC CHARACTERISTICSPROGRAMMING (UPI-C42 AND UPI-L42)
T
A
e
25
C
g
5
C V
CC
e
625V
g
025V V
DDL
ea
5V
g
025V V
DDH
e
1275V
g
025V
(87C4287L42 ONLY)
Symbol Parameter Min Max Units
t
AW
Address Setup Time to RESET
u
4t
CY
t
WA
Address Hold Time after RESET
u
4t
CY
t
DW
Data in Setup Time to PROG
v
4t
CY
t
WD
Data in Hold Time after PROG
u
4t
CY
t
PW
Initial Program Pulse Width 95 105 ms
t
TW
Test 0 Setup Time for Program Mode 4t
CY
t
WT
Test 0 Hold Time after Program Mode 4t
CY
t
DO
Test 0 to Data Out Delay 4t
CY
t
WW
RESET Pulse Width to Latch Address 4t
CY
t
r
t
f
PROG Rise and Fall Times 05 100 ms
t
CY
CPU Operation Cycle Time 25 375 ms
t
RE
RESET Setup Time before EA
u
4t
CY
t
OPW
Overprogram Pulse Width 285 7875 ms
(1)
t
DE
EA High to V
DD
High 1t
CY
NOTES
1 This variation is a function of the iteration counter value X
2 If TEST 0 is high t
DO
can be triggered by RESET
u
AC TESTING INPUTOUTPUT WAVEFORM
INPUTOUTPUT
290414–16
AC TESTING LOAD CIRCUIT
290414–17
19
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