µPD61P24

20

17.3

Program Memory Reading Procedure

(1) Pull down the pins not used to GND via resistor. Keep the CLK pin low.

(3) Wait for 10

(4) Set the mode in which the program memory address is cleared to 0, by using the mode setting pins.

(6) Set the program inhibit mode.

(7) Set the verify mode. If a clock pulse is input to the CLK pin, the data of one address is output each time the

pulse has been input to the CLK pin four times.

(8) Set the program inhibit mode.

(9) Set the mode in which the program memory address is cleared to 0.

(11) Turn off power supply.

Program memory reading steps (2) through (9) are illustrated below.

Hi-Z

Hi-Z

“ L ”

MD3

MD2

MD1

MD0

D0-D7

CLK

GND

GND

Reset

Data output

Data output