µPD17P228

13

Data Sheet U14542EJ1V0DS00

3.3 Program Memory Reading Procedure

(1)

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

(2)

(3)

µs.

(4)

Set the program memory address 0 clear mode by using the mode setting pins.

(5)

(6)

Set the program inhibit mode.

(7)

Set the verify mode. Data of each address is output sequentially each time the clock pulse is input to

the CLK pin four times.

(8)

Set the program inhibit mode.

(9)

Set the program memory address 0 clear mode.

(11) Turn off power.

The following figure illustrates steps (2) through (9) above.

Hi-Z

Hi-Z

"L"

CLK

GND

Reset

GND

Data output

Data output