SWRA004A
TRF1500 Integrated Dual-Band RF Receiver User’s Guide 17
TRF1500 Control State
The TRF1500 operates in 18 different states: The control code
and active circuits are given in Table 2.
Table 2. Control State and the Corresponding Active Circuits
Control Code
(HI/LO, SYN ON, RX ON, TX ON, STRONG SIGNAL, X2)
Active Circuits
000000 Sleep Mode
010000 Low-Band LO Input Buffer On LB LO Buffer
011000 Low-Band Receive Normal LB LO Buffer, LB LNA, LB Mixer
011010 Low-Band Receive Strong Signal LB LO Buffer, LB Mixer
010100 Low-Band Transmit Mixer LB LO Buffer, LB TX Mixer
011100 Low-Band Receive and Transmit Mixer LB LO Buffer, LB LNA (On High), LB Mixer, LB TX
Mixer
011110 Low-Band Transmit Mixer LB LO Buffer, LB LNA (On High), LB Mixer
010001 Doubler On LB LO Buffer, Frequency Doubler, HB LO Buffer
011001 Low-Band Receive Normal, Doubler On
LB LO Buffer, LB LNA, LB Mixer, Frequency
Doubler
011011 Low-Band Receive Strong Signal, Doubler
On
LB LO Buffer, LB Mixer, Frequency Doubler
011111 Low-Band Transmit, Doubler On LB LO Buffer, LB LNA (On High), LB Mixer, LB TX
Mixer
111011 High-Band Receive Strong Signal, Doubler
On
HB LO Buffer, HB Mixer, Frequency Doubler
110000 High-Band LO Input Buffer On HB LO Buffer
111000 High-Band Receive Normal HB LO Buffer, HB LNA, HB Mixer
111010 High-Band Receive Strong Signal HB LO Buffer, HB Mixer
111001 High-Band Receive Frequency, Doubler On LB LO Buffer, HB LO Buffer, HB LNA, HB Mixer,
Frequency Doubler
110100 High-Band Transmit Normal HB LO Buffer, HB TX Mixer
110101 High-Band Transmit Frequency, Doubler
On
HB LO Buffer, HB TX Mixer, Frequency Doubler,
LB LO Buffer
