Functional Block Diagram - Texas Instruments TRF7970A Instruction Manual

TRF7970A
SLOS743K – AUGUST 2011 – REVISED APRIL 2014
1.4

Functional Block Diagram

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