User's Manual

TRF7960
TRF7961
www.ti.com SLOU186F–AUGUST 2006–REVISED AUGUST 2010
5.3.1 Control Registers – Main Configuration Registers
Table 5-9. Chip Status Control (00h)
Controls the power mode, RF on / off, AGC, AM / PM
Register default is 0x01. It is preset at EN = L or POR = H
Bit Bit Name Function Comments
B7 stby 1 = standby mode Standby mode keeps regulators and oscillator running en_rec =
0 = active mode L, en_tx = L
B6 direct 1 = received sub-carrier signal (decoders The modulation control is direct through MOD input. The receiver
bypassed) sub-carrier signal is on I/0_6.
0 = received decoded signal from selected
decoder
B5 rf_on 1 = RF output active When B5 = 1, it activates the RF field.
0 = RF output not active
B4 rf_pwr 1 = half output power 1 = RF driver at 8 Ω
0 = full output power 0 = RF driver at 4 Ω
B3 pm_on 1 = RX_IN2 1 = Selects PM signal input
0 = RX_IN1 0 = Selects AM signal input
B2 agc_on 1 = AGC on AGC selection
0 = AGC off
B1 rec_on 1 = Reciever enable for external field Receiver and oscillator are enabled; intended for external field
measurement measurement.
B0 vrs5_3 1 = 5 V operation (V
IN
) Selects the V
DD_RF
range; 5 V (4.3 V – 5 V), or 3 V (2.7 V – 3.4
0 = 3 V operation (V
IN
) V)
Copyright © 2006–2010, Texas Instruments Incorporated System Description 25
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