1.4 Pinning

Figure 1-2. Pin Diagram
Note: The exposed die pad is connected to the internal die.
Table 1-2. Pin Description

Pin No.

Pin NameTypeEquivalent Circuit Description
1RFIN_LB Analog

LNA input for Low-Band frequency range (< 500 MHz)

2RFIN_HB Analog

LNA input for High-Band frequency range (> 500 MHz)

3SPDT_RX Analog

RX switch output (damped signal output)

4SPDT_ANT Analog

Antenna input (RXMode) and output (TXMode) of the SPDT switch

5ANT_TUNE Analog
Antenna tuning input
6SPDT_TXAnalogSee also circuit pin 3 and 4
TX mode input of the SPDT switch
7RF_OUTAnalog
Power amplifier output
8VS_PAAnalog

Power amplifier supply

  • 3V application: supply voltage (VS) input
  • 5V application: internal voltage regulator output
9TEST_EN

Test enable, connected to GND in application

10XTAL1Analog
Crystal oscillator pin 1 (input)
11XTAL2AnalogCrystal oscillator pin 2 (output)
12AVCCAnalogSee ESD Protection Circuits

RF front end supply regulator output

13VSAnalogSee ESD Protection CircuitsMain supply voltage input
14PC0DigitalSee I/O PortsMain

Alternate

:AVR® Port C0

:PCINT8/NRESET/DebugWIRE

15PC1DigitalSee I/O PortsMain

Alternate

:AVR Port C1

:NPWRON1/PCINT9/EXT_CLK

16PC2DigitalSee I/O PortsMain

Alternate

:AVR Port C2

:NPWRON2/PCINT10/TRPA

17PC3DigitalSee I/O PortsMain

Alternate

:AVR Port C3

:NPWRON3/PCINT11/TMDO/TxD

18PC4DigitalSee I/O PortsMain

Alternate

:AVR Port C4

:NPWRON4/PCINT12/INT0/TMDI/RxD

19PC5DigitalSee I/O PortsMain

Alternate

:AVR Port C5

:NPWRON5/PCINT13/TRPB/TMDO_CLK

20DVCCSee ESD Protection Circuits

Digital supply voltage regulator output

21DGNDSee ESD Protection CircuitsDigital ground
22PB0DigitalSee I/O PortsMain

Alternate

:AVR Port B0

:PCINT0/CLK_OUT

23PB1DigitalSee I/O PortsMain

Alternate

:AVR Port B1

:PCINT1/SCK

24PB2DigitalSee I/O PortsMain

Alternate

:AVR Port B2

:PCINT2/MOSI (SPI Host Out Client In)

25PB3DigitalSee I/O PortsMain

Alternate

:AVR Port B3

:PCINT3/MISO (SPI Host In Client Out)

26PB4DigitalSee I/O PortsMain

Alternate

:AVR Port B4

:PWRON/PCINT4/LED1 (strong high side driver)

27PB5DigitalSee I/O PortsMain

Alternate

:AVR Port B5

:PCINT5/INT1/NSS

28PB6DigitalSee I/O PortsMain

Alternate

:AVR Port B6

:PCINT6/EVENT (firmware controlled external microcontroller event flag)

29PB7DigitalSee I/O PortsMain

Alternate

:AVR Port B7

:NPWRON6/ PCINT7/RX_ACTIVE (strong high side driver)/LED0 (strong low side driver)

30AGNDSee ESD Protection CircuitsAnalog ground
31ATEST_IO2

RF front end test I/O 2 connected to GND in application

32ATEST_IO1

RF front end test I/O 1 connected to GND in application