TRF7970A
SLOS743K – AUGUST 2011 – REVISED APRIL 2014
www.ti.com
1.4
Functional Block Diagram
Figure 1-1 shows the block diagram.
VDD_I/O
RX_IN1
MUX
PHASE &
AMPLITUDE
DETECTOR
GAIN
RSSI
(AUX)
LOGIC
STATE
I/O_0
I/O_1
RF LEVEL
DETECTOR
CONTROL
LOGIC
I/O_2
RX_IN2
RSSI
(EXTERNAL)
[CONTROL
I/O_3
PHASE &
AMPLITUDE
GAIN
RSSI
(MAIN)
REGISTERS &
COMMAND
LOGIC]
I/O_4
I/O_5
VDD_PA
DETECTOR
FILTER
& AGC
DIGITIZER
MCU
INTERFACE
I/O_6
I/O_7
ISO
PROTOCOL
HANDLING
DECODER
IRQ
TX_OUT
TRANSMITTER ANALOG
FRONT END
FRAMING
BIT
FRAMING
127-BYTE
FIFO
SYS_CLK
DATA _CLK
SERIAL
VIN
VSS_PA
EN
EN2
ASK/OOK
MOD
OSC_IN
OSC_OUT
DIGITAL CONTROL
STATE MACHINE
CRYSTAL OR OSCILLATOR
TIMING SYSTEM
CONVERSION
CRC & PARITY
VOLTAGE SUPPLY REGULATOR SYSTEMS
(SUPPLY REGULATORS AND REFERENCE VOLTAGES)
Figure 1-1. Block Diagram
VDD_A
BAND_GAP
VSS_A
VDD_RF
VSS_RF
VDD_X
VSS
VSS_D
2
Device Overview
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