參數(shù)資料
型號(hào)： M34551M8
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER
中文描述： 單芯片4位CMOS微機(jī)紅外遙控器
文件頁(yè)數(shù)： 23/68頁(yè)
文件大小： 698K
代理商： M34551M8
23
MITSUBISHI MICROCOMPUTERS
4551 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for
INFRARED REMOTE CONTROL TRANSMITTER
CARRIER GENERATING CIRCUIT
The 4551 Group has a carrier generating circuit that generates
the transfer waveform by dividing the system clock (STCK) for
each remote control carrier wave. Each carrier waveform can be
output by setting the carrier wave selection register (C1).
Also, timer 1 can auto-control the carrier wave output from port
CARR by setting the carrier wave output control register (C2).
Fig. 22 Carrier wave selection register
Duty
Frequency
Carrier wave
Register C1
Setting value
No carrier wave
“L” fixed
C1
0
C1
1
C1
2
1/4
1/2
1/2
1/3
1/2
Output waveform
STCK/24
STCK/16
STCR instruction
SPCR instruction
C1
3
STCK/12
STCK/8
STCK
1/4
1/2
1/2
1/3
1/2
(at reset: 0 1 1 1
2
, at power down: 0 1 1 1
2
, W)
Carrier wave selection register C1
STCK/2
No available
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“H”
“L”
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
0
1
1
0
1
1
1
0
1
1
1
1
“H”
“L”
Note:“W” represents write enabled.
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