TRF6900
SINGLE-CHIP RF TRANSCEIVER
SLAS213C – SEPTEMBER 1999 – REVISED MAY 2000
PRINCIPLES OF OPERATION
operating modes (continued)
MODE Terminal (Terminal 17) = 1
Mode0 Register Settings
(D-Word)
Mode1 Register Settings
(C-Word)
Mixer Enable
Mixer Enable
1st IF Amplifier Enable
Limiter Enable
RSSI Enable
1st IF Amplifier Enable
Limiter Enable
RSSI Enable
Data Switch
Data Switch
LPF Amplifier Enable
Data Slicer Enable
Power Amplifier Mode
VCO Enable
LPF Amplifier Enable
Data Slicer Enable
Power Amplifier Mode
VCO Enable
PLL Enable
PLL Enable
Synthesizer:
Synthesizer:
DDS Frequency
DDS Frequency
MODE Terminal (Terminal 17) = 0
Figure 25. Interaction Between MODE Terminal and Preprogrammed Mode0 and Mode1 Control Registers
Table 6. Operating Mode Examples
FUNCTION/DESCRIPTION
Receive polling with frequency hopping, or scan band
Transmit and receive on different frequencies
MODE0
MODE1
Receive on frequency 0 Receive on frequency 1
Transmit on frequency 0 Receive on frequency 1
Broadcast on one frequency and receive on another
Transmit on frequency 0 Receive on frequency 1
(broadcast channel)
Rapid switch between receive and power saving mode (keep
DDS/VCO running)
Receive on frequency 0 All blocks off except DDS, VCO, and PLL
Emulate FSK transmit operation using the MODE terminal for
wideband FSK
Transmit on frequency 0 Transmit on frequency 0 + deviation
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TI [ TEXAS INSTRUMENTS ]
