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PIC12F635E/P датащи(PDF) 98 Page - Microchip Technology |
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PIC12F635E/P датащи(HTML) 98 Page - Microchip Technology |
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98 / 196 page ![]() PIC12F635/PIC16F636/639 DS41232B-page 96 Preliminary © 2005 Microchip Technology Inc. 11.31.2 CARRIER CLOCK OUTPUT When the Carrier Clock output is selected, the LFDATA output is a square pulse of the input carrier clock and available as soon as the AGC stabilization time (TAGC) is completed. There are two Configuration register options for the carrier clock output: (a) clock divide-by one or (b) clock divide-by four, depending on bit DATOUT<7> of Configuration Register 2 (Register 11-3). The carrier clock output is available immediately after the AGC settling time. The Output Enable Filter, AGCSIG, and MODMIN options are applicable for the carrier clock output in the same way as the demodulated output. The input channel can be individually enabled or disabled for the output. If more than one channel is enabled, the output is the sum of each output of all enabled channels. Therefore, the carrier clock output waveform is not as precise as when only one channel is enabled. It is recommended to enable one channel only if a precise output waveform is desired. There will be no valid output if all three channels are disabled. See Figure 11-13 for carrier clock output examples. Related Configuration register bits: • Configuration Register 1 (Register 11-2), DATOUT <8:7>: bit 8 bit 7 00 : Demodulator Output 01 : Carrier Clock Output 10 : RSSI Output 11 : RSSI Output • Configuration Register 2 (Register 11-3), CLKDIV<7>: 0 : Carrier Clock/1 1 : Carrier Clock/4 • Configuration Register 0 (Register 11-1): all bits are affected • Configuration Register 5 (Register 11-6) |
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