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TRF2443IPFPR Datasheet(PDF) 42 Page - Texas Instruments |
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TRF2443IPFPR Datasheet(HTML) 42 Page - Texas Instruments |
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42 / 72 page  TRF2443 SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 ................................................................................................................................... www.ti.com SPI3 Register 1 TX TX I and Q phase Register address SPI address TX VGA attenuation control PWD unbalance correction Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 TX I and ... Enable Loopback Detect PD ref RSV correction loopback attenuator reset 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 1 1 SPI address bits Bit4 ADDR_4 1 1 Bit5 PWD_TX 1 0 TX chain power down (1 = TX chain is off) Bit6 TX_ATT_0 0 App. specific TX chain variable-attenuator control; 000 0000 = minimum attenuation; Bit7 TX_ATT_1 0 App. specific 100 0111 = maximum attenuation (35.5 dB); Bit8 TX_ATT_2 0 App. specific attenuation step = 0.5 dB; Bit9 TX_ATT_3 1 App. specific Bit10 TX_ATT_4 0 App. specific Bit11 TX_ATT_5 0 App. specific Bit12 TX_ATT_6 0 App. specific Bit13 TXIQ_PHASE_0 0 0 TX LO I and Q phase-error correction bits. Suggested value is (0 1000). Bit14 TXIQ_PHASE_1 0 0 Bit15 TXIQ_PHASE_2 0 0 Bit16 TXIQ_PHASE_3 0 1 Bit17 TXIQ_PHASE_4 1 0 Bit18 EN_LB 0 0 Enable loopback switch (1 = enable) Bit19 EN_LB_ATT 0 0 Enable 20-dB attenuator in loopback (1 = enable) Bit20 DET_RESET 0 0 Software reset of power-detect alarm output Bit21 PD_REF_BUF 0 0 Power down reference-frequency input buffer (1 = disable) Bit22 RSV 0 0 Reserved Bit23 RSV 0 0 Reserved Bit24 RSV 0 0 Reserved Bit25 RSV 0 0 Reserved 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 PWD_TX (bit 5): When 1, the entire TX chain is off. TX_ATT<6,0>: TX chain variable-attenuator control bits, 000 0000 corresponds to minimum attenuation (maximum gain), and 100 0111 sets the attenuator to maximum (minimum gain). The typical attenuation step is 0.5 dB. TXIQ_PHASE<4,0>: TX I-Q phase unbalance correction bits. These bits allow correcting ±2 degrees of phase unbalance between the I and Q paths. Suggested value to program = 0 1000. 42 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TRF2443 |
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