APPOTECH CW6632B - Page 88

82 9.2 IR Receiver Control Registers
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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Position
7
6
5
4
3
2
1
0
Name
ZEROCYC
Default
0
1
0
1
0
0
0
0
When IR clock is 1 MHz, ZEROCYC*16*CLKCYC us is the cycle of IR BIT 0 and BIT 1 division. It is recommended
to set ZEROCYC to 0x50. (NOTE: BIT 0 cycle < ZEROCYC*8 < BIT 1 cycle )
When IR clock is 32 KHz, ZEROCYC*CLKCYC us is the cycle of IR BIT 0 and BIT 1 division. It is recommended to
set ZEROCYC to 0x28 (NOTE: BIT 0 cycle < ZEROCYC < BIT 1 cycle)
Third time for the REPEATCNT.
Position
7
6
5
4
3
2
1
0
Name
REPEATCNT
Default
0
0
0
0
0
1
0
0
When IR clock is 1 MHz, REPEATCNT*512*CLKCYC us is the IR repeat pulse (2.3ms). It is recommended to set
REPEATCNT to 0x04.
When IR clock is 32 KHz, REPEATCNT*32*CLKCYC us is the IR repeat pulse (2.3ms). It is recommended to set
REPEATCNT to 0x02.
Fourth time for the ENDCONT.
Position
7
6
5
4
3
2
1
0
Name
ENDCONT
Default
1
0
0
0
0
0
0
0
When IR clock is 1 MHz, ENDCONT *512*CLKCYC us is the IR incept high (4ms). It is recommended to set
ENDCONT to 0x08.
When IR clock is 32 KHz, ENDCONT *32*CLKCYC us is the IR incept high (4ms). It is recommended to set
ENDCONT to 0x09.
Fifth time for the BEGINCNT.
Position
7
6
5
4
3
2
1
0
Name
BEGINCNT
Default
0
0
0
1
0
0
0
1
When IR clock is 1 MHz, BEGINCNT * 512*CLKCYC us is the IR incept low (9ms). It is recommended to set
BEGINCNT to 0x11.
When IR clock is 32 KHz, BEGINCNT *32*CLKCYC us is the IR incept low (9ms). It is recommended to set
BEGINCNT to 0x08.
NOTE: When IR clock is 1 MHz and BEGINCNT or ENDCNT or REPEATCNT is configured to N，the detect range is
N*512*cycle ~ (N*512+511)*cycle.
NOTE: when IR clock is 32 KHz and BEGINCNT or ENDCNT or REPEATCNT is configured to N，the detect range is
N*32*cycle ~ (N*32+31)*cycle
Register 9-3 IRDAT0 – IR receiver data buffer0 register