參數(shù)資料
型號(hào)： μPD75P3036
廠商： NEC Corp.
英文描述： 4 Bit Single Chip Microcontrollers(4 位單片微控制器)
中文描述： 4位單片微控制器（4位單片微控制器）
文件頁(yè)數(shù)： 30/64頁(yè)
文件大?。?/td> 382K
代理商： ΜPD75P3036
30
m
PD75P3036
8. PROM (PROGRAM MEMORY) WRITE AND VERIFY
The
m
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.
Pin
Function
V
PP
Pin where program voltage is applied during program memory
write/verify (usually V
DD
potential)
X1, X2
Clock input pins for address updating during program memory
write/verify. Input the X1 pin’s inverted signal to the
X2 pin.
MD0 to MD3
Operation mode selection pin for program memory write/verify
D0/P40 to D3/P43
(lower 4 bits)
D4/P50 to D7/P53
(upper 4 bits)
8-bit data I/O pins for program memory write/verify
V
DD
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.
Caution
Pins not used for program memory write/verify should be connected to V
SS
.
8.1 Operation Modes for Program Memory Write/Verify
When +6 V is applied to the V
DD
pin and +12.5 V to the V
PP
pin, the
m
PD75P3036 enters the program memory write/verify
mode. The following operation modes can be specified by setting pins MD0 to MD3 as shown below.
Operation mode specification
Operation mode
V
PP
V
DD
MD0
MD1
MD2
MD3
+12.5 V
+6 V
H
L
H
L
Zero-clear program memory address
L
H
H
H
Write mode
L
L
H
H
Verify mode
H
X
H
H
Program inhibit mode
X: L or H
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