UPD75P3018A datasheet(34/66 Pages) RENESAS

Part #	UPD75P3018A

Description	MOS INTEGRATED CIRCUIT

PDF	66 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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34 / 66 page

µPD75P3018A

Data Sheet U11917EJ2V1DS

8.3 Program Memory Read Procedure

The

µPD75P3018A 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

µs.

(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

D0/P40 to D3/P43

D4/P50 to D7/P53

MD0/P30

MD2/P32

MD3/P33

MD1/P31

“L”

Data output

UPD75P3018A Datasheet(PDF) 34 Page - Renesas Technology Corp