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TRF2443IPFPR Datasheet(PDF) 37 Page - Texas Instruments |
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TRF2443IPFPR Datasheet(HTML) 37 Page - Texas Instruments |
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37 / 72 page  RX Synthesizer SPI registers TRF2443 www.ti.com ................................................................................................................................... SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 SPI2 Register 1 Register address SPI address RX reference divider Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 — REF VCO RX charge-pump current RX CP RSV RSV CP CP CP INV NEG DOUBLE OFF UP DN Bit16 Bit17 Bit18 Bit19 Bit20 Bit21 Bit22 Bit23 Bit24 Bit25 Bit26 Bit27 Bit28 Bit29 Bit30 Bit31 REGISTER POWER-ON SUGGESTED NAME DESCRIPTION 1 VALUE VALUE Bit0 ADDR_0 1 1 Register address bits Bit1 ADDR_1 0 0 Bit2 ADDR_2 0 0 Bit3 ADDR_3 0 0 SPI address bits Bit4 ADDR_4 1 1 Bit5 RXRDIV_0 0 App. specific Bit6 RXRDIV_1 0 App. specific 14-bit reference-divider value (minimum value Rmin = 1; Bit7 RXRDIV_2 0 App. specific maximum value Rmax = 16,383) Bit8 RXRDIV_3 0 App. specific Bit9 RXRDIV_4 0 App. specific Bit10 RXRDIV_5 0 App. specific Bit11 RXRDIV_6 0 App. specific Bit12 RXRDIV_7 0 App. specific Bit13 RXRDIV_8 0 App. specific Bit14 RXRDIV_9 0 App. specific Bit15 RXRDIV_10 0 App. specific Bit16 RXRDIV_11 0 App. specific Bit17 RXRDIV_12 0 App. specific Bit18 RXRDIV_13 0 App. specific Bit19 RXREF_INV 0 0 Invert reference-clock polarity; 1 = use falling edge Bit20 RXNEG_VCO 1 1 VCO polarity control; 1 = negative slope (negative Kv) Bit21 RXICP_0 0 0 Program charge-pump dc current, ICP from 0.5 mA (1 1111) to 2 mA (0 0000); default value 1 mA (0 1010) Bit22 RXICP_1 1 1 Bit23 RXICP_2 0 0 Bit24 RXICP_3 1 1 Bit25 RXICP_4 0 0 Bit26 RXICPDOUBLE 0 0 1 = set ICP to double the current Bit27 RSV 0 0 Reserved Bit28 RSV 0 0 Reserved Bit29 RXCP_OVERRIDE 0 0 1 = disable charge pump Bit30 RXCP_UP 0 0 1 = enable the charge-pump source current in disable mode Bit31 RXCP_DN 0 0 1 = enable the charge-pump sink current in disable mode SPI2 REGISTER 2 Register address SPI address RX N-divider value Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 DIV CAL EN RX N-divider value RSV CAL clock divider 8–16 SEL CAL Bit16 Bit17 Bit18 Bit19 Bit20 Bit21 Bit22 Bit23 Bit24 Bit25 Bit26 Bit27 Bit28 Bit29 Bit30 Bit31 Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 37 Product Folder Link(s): TRF2443 |
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