upd6p9 Renesas Electronics Corporation., upd6p9 Datasheet - Page 25

• Manufacturer Part Number: upd6p9
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

5.3 Program Memory Reading Procedure
V
V
DD
PP
(1) Pull down the pins not used to GND via a resistor. Keep the CLK pin low.
(2) Supply 5 V to the V
(3) Supply 5 V to the V
(4) Wait for 2 ms until oscillation of the ceramic resonator connected across the X
(5) Set the program memory address 0 clear mode by using the mode setting pins.
(6) Supply 6 V to V
(7) Set the program inhibit mode.
(8) Set the verify mode. Data of each address is output sequentially each time the clock pulse is input to
(9) Set the program inhibit mode.
(10) Set the program memory address 0 clear mode.
(11) Change the voltage on the V
(12) Turn off the power.
The following figure illustrates steps (2) through (10) above.
D
0
V
GND
GND
to D
CLK
MD
MD
MD
MD
V
DD+1
V
V
the CLK pin four times.
DD
DD
PP
7
0
1
2
3
Reset
Oscillation stabilization
DD
wait time
Hi-Z
and 12.5 V to V
DD
PP
pin after waiting for 10 µ s.
pin. Keep the V
"L"
DD
and V
Data output
PP
Data Sheet U15144EJ1V1DS
.
PP
PP
pins to 5 V.
pin low.
Data output
IN
and X
OUT
pins stabilizes.
µ PD6P9
Hi-Z
25