CIRCC View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'CIRCC' PDF : 70 Pages View PDF
Receive Carrier Sense
The Programmable Receive Carrier Sense
register is used to program the Consumer IR
decoder to detect the presence of IR energy in a
wide-to-narrow range of carrier frequencies. The
register is two bits wide.
The range values are shown in Table 10.
Carriers that fall outside of the programmed
range set the Frame Abort bit. If the “Carrier Off”
bit is active, the Receive Carrier range sensitivity
function is disabled.
Table 10 - Receive Carrier Sense Range
D1
D0
RANGE
0
0
±10%
0
1
±20%
1
0
±40%
1
1
Reserved
1
SCE Tx Data
Transmitter
TV Tx Output
Tx Polarity bit = 1 (default)
0
1
1/Carrier
Light
No Light
TV Rx Input
Receiver
SCE Rx Data
Driver
Rx Polarity bit = 0 (default)
No Light
Light
1/Bit Rate
FIGURE 6 - REMOTE CONTROL ASK ENCODE/DECODE
15
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