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TRF2443IPFPR Datasheet(PDF) 36 Page - Texas Instruments |
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TRF2443IPFPR Datasheet(HTML) 36 Page - Texas Instruments |
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36 / 72 page  TRF2443 SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 ................................................................................................................................... www.ti.com REGISTER POWER-ON SUGGESTED NAME DESCRIPTION 4 VALUE VALUE Bit26 TXVCO_TRIM_0 0 0 VCO coarse-frequency tuning control (manual mode) Bit27 TXVCO_TRIM_1 0 0 Bit28 TXVCO_TRIM_2 0 0 Bit29 TXVCO_TRIM_3 0 0 Bit30 TXVCO_TRIM_4 0 0 Bit31 TXVCO_TRIM_5 0 0 SPI1 Register 5 Register address SPI address TXPLL bias RSV RSV TXVCO bias BUF1 bias Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 BUF2 bias OUTBUF bias PRESC bias BIAS VCO CAL REF RSV RSV RSV RSV RSV RSV SEL Bit16 Bit17 Bit18 Bit19 Bit20 Bit21 Bit22 Bit23 Bit24 Bit25 Bit26 Bit27 Bit28 Bit29 Bit30 Bit31 REGISTER POWER-ON SUGGESTED NAME DESCRIPTION 5 VALUE VALUE Bit0 ADDR_0 1 1 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 TXPLL_BIAS_0 0 0 TX PLL reference-current control bits. Adjust reference current from 40 µA to 60 µA. Suggested value is 52 µA (100). Bit6 TXPLL_BIAS_1 0 0 Bit7 TXPLL_BIAS_2 1 1 Bit8 RSV 0 0 Reserved Bit9 RSV 0 0 Reserved Bit10 TXVCO_BIAS_0 0 0 TX VCO bias control bits. VCO current can be changed from 10 mA (0000) to 25 mA (1111), 1-mA step. Suggested value is 18 mA Bit11 TXVCO_BIAS_1 0 0 (1000). Bit12 TXVCO_BIAS_2 0 0 Bit13 TXVCO_BIAS_3 1 1 Bit14 TXBUF1_BIAS_0 0 0 It sets the PLL buffer-1 bias from 0.8 mA (00) to 2 mA (11), 0.4-mA step. Suggested value is 1.6 mA (10). Bit15 TXBUF1_BIAS_1 1 1 Bit16 TXBUF2_BIAS_0 0 0 It sets the PLL buffer-2 bias from 0.8 mA (00) to 2 mA (11), 0.4-mA step. Suggested value is 1.6 mA (10). Bit17 TXBUF2_BIAS_1 1 1 Bit18 TXBUFOUT_BIAS_0 0 0 TXPLL output-buffer reference bias current. 200 µA (00) to 500 µA (11). Suggested value is 400 µA (10). Bit19 TXBUFOUT_BIAS_1 1 1 Bit20 TXPRES_BIAS_0 1 0 TXPLL prescaler reference bias current. 200 µA (00) to 500 µA (11). Suggested value is 400 µA (10). Bit21 TXPRES_BIAS_1 1 1 Bit22 TXVCO_CAL_IB 0 1 Select bias current type for VCO calibration circuitry 1 = PTAT; 0 = constant over temperature Bit23 TXVCO_CAL_REF_0 0 1 TX VCO calibration reference-voltage trimming. Bit24 TXVCO_CAL_REF_1 0 1 000 → 1.175 V Bit25 TXVCO_CAL_REF_2 0 0 111 → 2.05 V. Suggested value is 1.55 V (011). Bit26 RSV 0 0 Reserved Bit27 RSV 0 0 Reserved Bit28 RSV 0 0 Reserved Bit29 RSV 0 0 Reserved Bit30 RSV 0 0 Reserved Bit31 RSV 0 0 Reserved 36 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TRF2443 |
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