Texas Instruments TRF7963A Manual page 43

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6.14.1.1 Main Configuration Registers
6.14.1.1.1 Chip Status Control Register (0x00)
Table 6-16 describes the bit fields of the Chip Status Control register. This register controls the power
mode, RF on or off, AM or PM, and direct mode.
Default Value: 0x01, set at EN = L or POR = H
BIT NO. BIT NAME
B7 stby
B6 direct
B5 rf_on
B4 rf_pwr
B3 pm_on
B2 Reserved
B1 rec_on
B0 vrs5_3
Copyright © 2011–2020, Texas Instruments Incorporated
Table 6-16. Chip Status Control Register (0x00)
FUNCTION
Standby mode keeps all supply regulators and the 13.56-MHz SYS_CLK
1 = Standby mode
oscillator running (typical start-up time to full operation is 100 µs).
0 = Active mode Active mode (default)
Provides user direct access to AFE (direct mode 0) or lets the user add
1 = Direct mode 0 or 1 custom framing (direct mode 1). Bit 6 of the ISO Control register must be set
before entering direct mode 0 or 1.
Uses SPI or parallel communication with automatic framing and ISO
0 = ISO mode (default)
decoders
1 = RF output active Transmitter on, receivers on
0 = RF output not active Transmitter off
TX_OUT (pin 5) = 8-Ω output impedance
1 = Half output power
P = 100 mW (+20 dBm) at 5 V, P = 33 mW (+15 dBm) at 3.3 V
TX_OUT (pin 5) = 4-Ω output impedance
0 = Full output power
P = 200 mW (+23 dBm) at 5 V, P = 70 mW (+18 dBm) at 3.3 V
1 = Selects aux RX input RX_IN2 input is used
0 = Selects main RX
RX_IN1 input is used
input
1 = Receiver activated
Forces enabling of receiver and TX oscillator. Used for external field
for external field
measurement.
measurement
0 = Automatic enable Allows enable of the receiver by bit 5 of this register
1 = 5-V operation
Selects the VIN voltage range
0 = 3-V operation
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SLOS758G – DECEMBER 2011 – REVISED MARCH 2020
DESCRIPTION
TRF7963A
TRF7963A
Detailed Description 43