參數(shù)資料
型號: μPD75P0116
廠商: NEC Corp.
英文描述: 4 Bit RISC Microcontrollers(4 位單片微控制器)
中文描述: 4位RISC微控制器(4位單片微控制器)
文件頁數(shù): 30/62頁
文件大小: 309K
代理商: ΜPD75P0116
m
PD75P0116
30
8.3 Steps in Program Memory Read Operation
The
m
PD75P0116 can read out the program memory contents via the following steps.
(1)
Pull down unused pins to V
SS
via resistors. Set the CL1 pin to low.
(2)
Apply +5 V to the V
DD
and V
PP
pins.
(3)
Wait 10
m
s.
(4)
Zero-clear mode for program memory addresses.
(5)
Apply +6 V power to V
DD
and +12.5 V to V
PP
.
(6)
Verify mode. When a clock pulse is input to the CL1 pin, data is output sequentially to one address at a time based
on a cycle of four pulse inputs.
(7)
Zero-clear mode for program memory addresses.
(8)
Apply +5 V power to the V
DD
and V
PP
pins.
(9)
Power supply OFF
The following diagram illustrates steps (2) to (7).
V
PP
V
DD
V
DD
+ 1
V
DD
V
DD
V
PP
CL1
D0/P40-D3/P43
D4/P50-D7/P53
Data output
Data output
MD0/P30
MD2/P32
MD3/P33
MD1/P31
“L”
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