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MRF89XA Folha de dados(PDF) 49 Page - Microchip Technology |
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MRF89XA Folha de dados(HTML) 49 Page - Microchip Technology |
49 / 140 page 2010-2017 Microchip Technology Inc. Preliminary DS70000622D-page 49 MRF89XA 2.18 Transmitter Configuration Registers 2.18.1 TRANSMIT PARAMTER CONFIGURATION REGISTER DETAILS REGISTER 2-27: TXCONREG: TRANSMIT PARAMETER CONFIGURATION REGISTER (ADDRESS:0x1A) (POR:0x7C) R/W-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-0 r TXIPOLFV<3:0> TXOPVAL<2:0> — bit 7 bit 0 R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown r = Reserved bit 7-4 TXIPOLFV<3:0>: Transmission Interpolation Filter Cut Off Frequency Value bits These bits control the cut-off frequency (fc) of the interpolation filter in the transmission path. TXIPOLFV<3:0> = 0111 fc = 200 kHz (default) Where, TXIPOLFV <3:0> is the value in the register. fc is the cut-off frequency. fo is the local oscillator frequency (center frequency). fxtal is the crystal oscillator frequency. bit 3-1 TXOPVAL<2:0>: Transmit Output Power Value bits (1 step ≈ 3dB) 111 = -8 dBm 110 = -5 dBm 101 = -2 dBm 100 = 1 dBm 011 = 4 dBm 010 = 7 dBm 001 = 10 dBm (default) 000 = 13 dBm bit 0 Reserved: Reserved bit; do not use 0 = Reserved (default) fc 200 kHz fxtalMHz 12.8MHz ----------------------- val TXIPOLFV 1 + 8 --------------------------------------------------------- = |
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