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TRF2443IPFPR Datasheet(PDF) 34 Page - Texas Instruments |
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TRF2443IPFPR Datasheet(HTML) 34 Page - Texas Instruments |
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34 / 72 page  TRF2443 SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 ................................................................................................................................... www.ti.com SPI1 Register 2 Register address SPI address TX N-divider value Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 TX N-divider value RSV DIV 8–16 CAL clock divider CAL SEL EN CAL Bit16 Bit17 Bit18 Bit19 Bit20 Bit21 Bit22 Bit23 Bit24 Bit25 Bit26 Bit27 Bit28 Bit29 Bit30 Bit31 REGISTER POWER-ON SUGGESTED NAME DESCRIPTION 2 VALUE VALUE Bit0 ADDR_0 0 0 Register address bits Bit1 ADDR_1 1 1 Bit2 ADDR_2 0 0 Bit3 ADDR_3 1 1 SPI address bits Bit4 ADDR_4 0 0 Bit5 TX_NINT_0 0 App. specific TX PLL N-divider division setting Power-On value = 68 (<0000 0000 0100 0100) → Bit6 TX_NINT_1 0 App. specific fVCO = 2720 MHz (with fPFD = 20 MHz) Bit7 TX_NINT_2 1 App. specific fout = 340 MHz Bit8 TX_NINT_3 0 App. specific (minimum value Nmin = 56; maximum value Nmax = 65,535) Bit9 TX_NINT_4 0 App. specific Bit10 TX_NINT_5 0 App. specific Bit11 TX_NINT_6 1 App. specific Bit12 TX_NINT_7 0 App. specific Bit13 TX_NINT_8 0 App. specific Bit14 TX_NINT_9 0 App. specific Bit15 TX_NINT_10 0 App. specific Bit16 TX_NINT_11 0 App. specific Bit17 TX_NINT_12 0 App. specific Bit18 TX_NINT_13 0 App. specific Bit19 TX_NINT_14 0 App. specific Bit20 TX_NINT_15 0 App. specific Bit21 RSV 0 0 Reserved Bit22 RSV 0 0 Reserved Bit23 RSV 0 0 Reserved Bit24 RSV 0 0 Reserved Bit25 RSV 1 1 Reserved Bit26 TXDIV_SEL 1 1 TX VCO divider selection (1 = divide by 8; 0 = divide by 16) Bit27 TXCAL_CLK_0 1 1 Set the clock speed used in the TX VCO frequency autocalibration. The clock is derived from the reference clock through a frequency Bit28 TXCAL_CLK_1 0 0 divider. Bit29 TXCAL_CLK_2 1 1 Bit30 TXCAL_SEL 0 1 Select the TX VCO frequency calibration mode (1 = autocalibration; 0 = manual) Bit31 EN_TXCAL 0 1 Enable TX VCO frequency autocalibration (1 → start) 34 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TRF2443 |
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