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TRF2443IPFPR Datasheet(PDF) 35 Page - Texas Instruments |
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TRF2443IPFPR Datasheet(HTML) 35 Page - Texas Instruments |
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35 / 72 page  TRF2443 www.ti.com ................................................................................................................................... SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 TXCAL_CLK<2,0>: Set the frequency divider value used to derive the TX VCO calibration clock from the reference clock (See Table 4) Table 4. TX VCO Calibration Clock Divider vs TXCAL_CLK<2,0> TXCAL_CLK FREQUENCY DIVIDER 000 1 001 8 010 16 011 128 100 256 101 1024 110 2048 111 16,684 SPI1 Register 4 Register address SPI address RSV RSV RSV RSV RSV RSV Power down TX PLL blocks RSV Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 RSV Power down TX PLL blocks RSV RSV RSV TXVCO trim Bit16 Bit17 Bit18 Bit19 Bit20 Bit21 Bit22 Bit23 Bit24 Bit25 Bit26 Bit27 Bit28 Bit29 Bit30 Bit31 REGISTER POWER-ON SUGGESTED NAME DESCRIPTION 4 VALUE VALUE Bit0 ADDR_0 0 0 Register address bits Bit1 ADDR_1 0 0 Bit2 ADDR_2 1 1 Bit3 ADDR_3 1 1 SPI address bits Bit4 ADDR_4 0 0 Bit5 RSV 0 0 Reserved Bit6 RSV 0 0 Reserved Bit7 RSV 0 0 Reserved Bit8 RSV 0 0 Reserved Bit9 RSV 1 1 Reserved Bit10 RSV 1 1 Reserved Bit11 PWD_TXCP 0 0 When 1, TX charge pump is off Bit12 PWD_TXVCO 0 0 When 1, TX VCO is off Bit13 PWD_TXBUF1 0 0 Power down VCO buffer 1 (1 = off) Bit14 PWD_TXBUF2 0 0 Power down VCO buffer 2 (1 = off) Bit15 RSV 1 1 Reserved Bit16 PWD_TX_TESTBUF 0 1 Power down TXVCO output buffer, pin TXLOTEST (1 = off) Bit17 PWD_TXDIV2 0 0 Power down VCO divider (1 = off) Bit18 PWD_TXPRESC 0 0 Power down prescaler buffer (1 = off) Bit19 PWD_TXRESYNC 0 0 Power down re-synch D flip-flop (1 = off) Bit20 PWD_TXPLL 0 0 Power down whole TX PLL (1 = off) Bit21 PWD_TXDIV 0 0 Power down LO divider (1 = off) Bit22 PWD_TXDET 0 0 Power down VCO detector (1 = off; used for VCO calibration) Bit23 RSV 0 0 Reserved Bit24 RSV 0 0 Reserved Bit25 RSV 0 0 Reserved Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 35 Product Folder Link(s): TRF2443 |
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