UPD75P3036 NEC, UPD75P3036 Datasheet - Page 30

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UPD75P3036

Manufacturer Part Number
UPD75P3036
Description
4-BIT SINGLE-CHIP MICROCONTROLLER
Manufacturer
NEC
Datasheet

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8. PROM (PROGRAM MEMORY) WRITE AND VERIFY
The PD75P3036 contains a 16384 x 8-bit PROM as a program memory. The pins listed in the table below are used for
this PROM’s write/verify operations. Clock input from the X1 pin is used instead of address input as a method for updating
addresses.
Caution Pins not used for program memory write/verify should be connected to V
8.1 Operation Modes for Program Memory Write/Verify
When +6 V is applied to the V
mode. The following operation modes can be specified by setting pins MD0 to MD3 as shown below.
X: L or H
V
+12.5 V
PP
V
X1, X2
MD0 to MD3
D0/P40 to D3/P43
(lower 4 bits)
D4/P50 to D7/P53
(upper 4 bits)
V
Operation mode specification
PP
DD
V
+6 V
DD
Pin
DD
pin and +12.5 V to the V
MD0
H
L
L
H
MD1
L
H
L
X
Pin where program voltage is applied during program memory
write/verify (usually V
Clock input pins for address updating during program memory
write/verify. Input the X1 pin’s inverted signal to the
X2 pin.
Operation mode selection pin for program memory write/verify
8-bit data I/O pins for program memory write/verify
Pin where power supply voltage is applied. Applies 1.8 to 5.5
V in normal operation mode and +6 V for program
memory write/verify.
MD2
H
H
H
H
PP
MD3
L
H
H
H
pin, the PD75P3036 enters the program memory write/verify
Zero-clear program memory address
Write mode
Verify mode
Program inhibit mode
DD
potential)
Function
Operation mode
SS
.
PD75P3036

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