upd64a Renesas Electronics Corporation., upd64a Datasheet - Page 59

• Manufacturer Part Number: upd64a
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

REM output
(5) Carrier waveform (enlarged waveform of each code’s high period)
(6) Bit array of each code
Leader code
Caution To prevent malfunction with other systems when receiving data in the NEC transmission
format, the total 32 bits of the 16-bit custom codes (Custom code, Custom code’) and the
16-bit data codes (Data code, Data code) must not only be fully decoded (make sure to check
Data code as well) but also checked to make sure that no signals are present.
C
0
C
1
Custom code
C
2
C
8.77 s
3
C
4
C
5
C
6
C
7
26.3 s
Data Sheet U14380EJ3V0DS00
C
C
C
or
0
0
o
'
C
C
C
or
1
1
1
'
Custom code
C
C
C
or
2
2
2
'
C
C
C
or
3
9 ms or 0.56 ms
Carrier frequency: 38 kHz
3
3
'
C
C
C
or
4
4
4
'
C
C
C
or
5
5
5
'
,
C
C
C
or
6
6
6
'
C
C
C
or
7
7
7
'
D
0
D
1
D
Data code
2
D
3
D
4
D
5
D
6
D
7
D
0
D
1
D
PD64A, 65
Data code
2
D
3
D
4
D
5
D
6
D
59
7