UPD75P0116CU datasheet(30/63 Pages) RENESAS

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µPD75P0116

Data Sheet U12603EJ1V1DS

8. ONE-TIME PROM (PROGRAM MEMORY) WRITE AND VERIFY

The program memory in the

µPD75P0116 is a 16384 × 8-bit electronic write-enabled one-time PROM. The pins listed

in the table below are used for this PROM’s write/verify operations. Clock input from the CL1 pins is used instead of

address input as a method for updating addresses.

Pin name

Function

VPP

Pin (usually VDD) where programming voltage is applied during

program memory write/verify

CL1, CL2

Clock input to the CL1 pin for address updating during program

memory write/verify. Leave the CL2 pin open.

MD0/P30-MD3/P33

Operation mode selection pin for program memory write/verify

D0/P40-D3/P43 (lower 4)

8-bit data I/O pin for program memory write/verify

D4/P50-D7/P53 (higher 4)

VDD

Pin where power supply voltage is applied. Power voltage

range for normal operation is 1.8 to 5.5 V. Apply 6.0 V for

program memory write/verify.

Caution

Pins not used for program memory write/verify should be processed as follows.

• All unused pins except XT2 ...... Connect to Vss via a pull-down resistor

• XT2 pin ........................................ Leave open

8.1 Operation Modes for Program Memory Write/Verify

When +6 V is applied to the

µPD75P0116’s VDD pin and +12.5 V is applied to its VPP pin, program write/verify modes

are in effect. Furthermore, the following detailed operation modes can be specified by setting pins MD0 to MD3 as shown

below.

Operation mode specification

Operation mode

VPP

VDD

MD0

MD1

MD2

MD3

+12.5 V

+6 V

Zero-clear program memory address

Write mode

Verify mode

Program inhibit mode

Remark

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