TRF6900A Datasheet, PDF (27/35 Pages) Texas Instruments – SINGLE-CHIP RF TRANSCEIVER

TRF6900A
SINGLE-CHIP RF TRANSCEIVER
SLAS258D – SEPTEMBER 2000 – REVISED SEPTEMBER 2001
PRINCIPLES OF OPERATION
operating modes (continued)
MODE Terminal (Terminal 17) = 1
Mode0 Register Settings
(D-Word)
Mixer Enable
1st IF Amplifier Enable
Limiter Enable
RSSI Enable
Data Switch
LPF Amplifier Enable
Data Slicer Enable
Power Amplifier Mode
VCO Enable
PLL Enable
Synthesizer:
DDS Frequency
Mode1 Register Settings
(C-Word)
Mixer Enable
1st IF Amplifier Enable
Limiter Enable
RSSI Enable
Data Switch
LPF Amplifier Enable
Data Slicer Enable
Power Amplifier Mode
VCO Enable
PLL Enable
Synthesizer:
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
Broadcast on one frequency and receive on another
Rapid switch between receive and power saving mode (keep
DDS/VCO running)
Emulate FSK transmit operation using the MODE terminal for
wideband FSK
MODE0
Receive on frequency 0
Transmit on frequency 0
Transmit on frequency 0
(broadcast channel)
Receive on frequency 0
MODE1
Receive on frequency 1
Receive on frequency 1
Receive on frequency 1
All blocks off except DDS, VCO, and PLL
Transmit on frequency 0 Transmit on frequency 0 + deviation
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