Philips PM2521 Service Manual page 135

143
8.7.
MEMORY AND
MICROPROCESSOR
2716
16k (2kx8)
UV ERASABLE PROM
PIN
CONFIGURATION
PIN
NAMES
>
o
1
_>
o
ADDRESSES
PD/PGM
POWER DOWN/PROG RAM
CHIP
SELECT
O
1
O
o OUTPUTS
DATA OUTPUTS
BLOCK DIAGRAM
Vcco
MODE
SELECTION
Pins
Mode
CE/PGM
(18)
OE
(20)
Vpp
(21)
Vcc
(24)
Outputs
(9-11,
13-17)
Read
VlL V|L
+5
+5
'^OUT
Standby
V|L
Don't
care
+5 +5
High
Z
Program
Pulsed
V
to
V
V|H
+25 +5
•^IN
Program Verify
V|L
''iL
+25
+5
•^OUT
Program
Inhibit
V|L V|H
+25 +5
High
Z