IT8712F Datasheet, PDF (169/189 Pages) List of Unclassifed Manufacturers – Environment Control -Low Pin Count Input / Output(EC - LPC I/O)

Functional Description
9.11.6.5 CIR Transmitter Control Register (TCR2)
The TCR2, an 8-bit read/write register, is used to determine the carrier frequency.
Address: Base Address + 4h
Bit
R/W
Default
7-3
R/W
01011b
2-0
R/W
100b
Description
Carrier Frequency (CFQ[4:0])
These five bits are used to determine the modulation carrier frequency.
See Table 10-48.
Transmitter Modulation Pulse Width (TXMPW[2:0])
These three bits are used to set the Transmitter Modulation pulse width.
The duty cycle of the carrier will be determined according to the settings
of Carrier Frequency and the selection of Transmitter Modulation pulse
width.
TXMPW[2:0]
HCFS = 0
HCFS = 1
000
Reserved
Reserved
001
Reserved
Reserved
010
6 µs
0.7 µs
011
7 µs
0.8 µs
100
8.7 µs
0.9 µs (Default)
101
10.6 µs
1.0 µs
110
13.3 µs
1.16 µs
111
Reserved
Reserved
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IT8712F V0.81