Texas Instruments AFE79 Series User Manual

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131
SBAU337–May 2020
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Macro
Coarse Index Swap I and Q: Applicable in only modes where coarse index is sent on the LSBs. If 0,
send the normal data. If 1, swap the coarse index data on I and Q.
Digital Back Off: This accounts for the digital back off that needs to be accounted for when the coarse-
fine mode is being used. Used only when coarse/fine range is lower than required total gain range (dB
setting=Total gain range - coarse/fine range).
Gain Change Indication: Applicable only in 3-bit coarse index over LSB mode. If Set, the fourth bit (MSB)
can be used for indicating whenever Total gain changes.
1.2.5.20 LNA Temperature Configuration Macro
The current LNA temperature in degree celsius (°C) can be specified through this macro. Based on the
current temperature nearest LNA gain phase value will be used in the AGC. The LNA gain phase values
across temperature need to be specified in AGC External LNA Gain Control Configuration Macro.
Table 1-80.
Macro LNA Temperature Configuration
Opcode 0x6E
Operand Offset Length Value Functionality Results
1 0x00 1 RX Channel Select Bit 0: 1 → Value
specified in
subsequent
operands is valid for
1RX.
Bit 1: 1 → Value
specified in
subsequent
operands is valid for
2RX.
Bit 2: 1 → Value
specified in
subsequent
operands is valid for
3RX.
Bit 3: 1 → Value
specified in
subsequent
operands is valid for
4RX.
Bit 4 → RESERVED
Bit 5 → RESERVED
2 0x01 1 Ext LNA
Temperature for
LNA0 (Signed value
in degree Celsius)
3 0x02 1 Ext LNA
Temperature for
LNA1(Signed value
in degree Celsius)
Memory Not used
1.2.5.21 ALC Coarse Index Pins Delay Macro
Table 1-81.
Macro ALC Coarse Index Pins Delay
Opcode 0x80
Operand Offset Length Value Functionality Results

Texas Instruments AFE79 Series Specifications

General

Brand	Texas Instruments
Model	AFE79 Series
Category	Control Unit
Language	English