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CIRCC Datasheet(PDF) 15 Page - SMSC Corporation |
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CIRCC Datasheet(HTML) 15 Page - SMSC Corporation |
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15 / 70 page  15 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 10 1 SCE Tx Data TV Tx Output Transmitter TV Rx Input SCE Rx Data Driver Receiver 1/Carrier 1/Bit Rate No Light Light Light No Light Tx Polarity bit = 1 (default) Rx Polarity bit = 0 (default) FIGURE 6 - REMOTE CONTROL ASK ENCODE/DECODE |
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