UPD6P8 datasheet(69/101 Pages) RENESAS

69 / 101 page

µPD6P8, 6P8A, 6P8B

Data Sheet U17848EJ5V0DS

Perform initialization according to the following procedure.

(1)

Supply 3 V to the VDD pin. Set the VPP pin to low level.

(2)

Supply 3 V (same potential as VDD) to the VPP pin after waiting for 10

µs.

(3)

Wait for 2 ms until oscillation stabilizes.

(4)

Supply 10.5 V to the VPP pin.

(5)

Wait for 1 ms until oscillation stabilizes.

(6)

Transmit the PCRESET instruction from the programmer.

(7)

Transmit the SSVERIFY instruction from the programmer for silicon signature verification.

VPP (10.5 V)

VDD

VPP

VDD

GND

VDD

GND

10 s

13.2 Serial Communication Format

Instruction

Data

All instructions consist of a 5-bit instruction and 5-bit data.

The data from the programmer is latched at the rising edge of SCLK. The

µPD6P8A and 6P8B output data is

output at the falling edge of SCLK.

Instruction format

210

MD4

MD3

MD2

MD1

MD0

MD4 to MD0

Instruction

Function

Reset

Clearing the program memory address to 0

Verify

Verify mode

Program

Write mode

Increment

Incrementing of the program memory address

Signature verify

Silicon signature verify mode

Inhibit

Program inhibit mode

UPD6P8 Datasheet(PDF) 69 Page - Renesas Technology Corp

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