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UPD75P0076CU Datasheet(PDF) 33 Page - Renesas Technology Corp

No. de pieza UPD75P0076CU
Descripción Electrónicos  MOS INTEGRATED CIRCUIT
PDF  64 Pages
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Fabricante Electrónico  RENESAS [Renesas Technology Corp]
Página de inicio  http://www.renesas.com
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UPD75P0076CU Datasheet(HTML) 33 Page - Renesas Technology Corp

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µPD75P0076
31
Data Sheet U10232EJ1V1DS
8.3 Steps in Program Memory Read Operation
The
µPD75P0076 can read out the program memory contents via the following steps.
(1)
Pull down unused pins to VSS via resistors. Set the X1 pin to low.
(2)
Apply +5 V to the VDD and VPP pins.
(3)
Wait 10
µs.
(4)
Zero-clear mode for program memory addresses.
(5)
Apply +6 V to VDD and +12.5 V to VPP.
(6)
Verify mode. When a clock pulse is input to the X1 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 to the VDD and VPP pins.
(9)
Power supply OFF
The following diagram illustrates steps (2) to (7).
VPP
VDD
VDD + 1
VDD
VPP
VDD
X1
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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