參數(shù)資料
型號(hào)： UPD75P3018AGK-9EU
廠商： NEC Corp.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 26/64頁(yè)
文件大?。?/td> 356K
代理商： UPD75P3018AGK-9EU
PD75P3018A
32
Data Sheet U11917EJ2V0DS00
8.3 Program Memory Read Procedure
The
PD75P3018A can read program memory contents using the following procedure.
(1)
Pull unused pins to Vss through resistors. Set the X1 pin low.
(2)
Supply 5 V to the VDD and VPP pins.
(3)
Wait 10
s.
(4)
Select the zero-clear program memory address mode.
(5)
Supply 6 V to the VDD and 12.5 V to the VPP pins.
(6)
Select the verify mode. Apply four pulses to the X1 pin. Every four clock pulses will output the data stored in one
address.
(7)
Select the zero-clear program memory address mode.
(8)
Return the VDD and VPP pins back to 5 V.
(9)
Turn off the power.
The following figure shows steps (2) to (7).
VPP
VDD
VDD + 1
VDD
VPP
VDD
X1
D0/P40 to D3/P43
D4/P50 to D7/P53
MD0/P30
MD2/P32
MD3/P33
MD1/P31
“L”
Data output
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