PD17P246_15 Datasheet, PDF (18/34 Pages) Renesas Technology Corp – PD17P246_15 FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROLLER

µPD17P246
3.3 Program Memory Reading Procedure
(1) Pull down the pins not used to GND via a resistor. Keep the CLK pin low.
(2) Supply 5 V to the VDD pin. Keep the VPP pin low.
(3) Supply 5 V to the VPP pin after waiting for 10 µs.
(4) Set the program memory address 0 clear mode by using the mode setting pins.
(5) Supply +6 V to VDD and +12.5 V to VPP.
(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.
(10) Change the voltage on the VDD and VPP pins to 5 V.
(11) Turn off power.
The following figure illustrates steps (2) through (9) above.
Reset
VPP
VPP
VDD
GND
VDD+1
VDD
VDD
GND
CLK
One cycle
Hi-Z
Hi-Z
D0 to D7
Data output
Data output
MD0
MD1
"L"
MD2
MD3
16
Data Sheet U15215EJ1V0DS