upd63a Renesas Electronics Corporation., upd63a Datasheet - Page 55

• Manufacturer Part Number: upd63a
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

13. APPLIED CIRCUIT EXAMPLE
Example of Application to System
· Remote-control transmitter (40 keys; mode selection switch accommodated)
· Remote-control transmitter (48 keys accommodated)
Remark When the POC circuit of the mask option is used effectively, it is not necessary to connect the capacitor
+
enclosed in the dotted lines.
+
+
+
K
K
S
S
REM
V
X
X
GND
RESET
I/O6
I/O7
0
1
DD
OUT
IN
/LED
K
K
S
S
REM
V
X
X
GND
RESET
I/O6
I/O7
0
1
DD
OUT
IN
/LED
K
K
K
K
K
K
I/O5
I/O4
I/O3
I/O2
I/O1
I/O0
K
K
K
K
I3
I2
I1
I0
K
K
K
K
K
K
I/O5
I/O4
I/O3
I/O2
I/O1
I/O0
K
K
K
K
I3
I2
I1
I0
Key matrix
8
5 = 40 keys
Key matrix
8
6 = 48 keys
Mode selection switch
PD63, 63A, 64
55