User's Manual

AVR600

8293-AVR-02/10

Table 4-1. Radio Frequency 10-pin header

Pin Name Name

1 Reset

Misc 2

3 Interrupt

Sleep Transmit 4

5 Chip Select

MOSI 6

7 MISO

SCK 8

9 GND

VCC (1.8 – 3.6V) 10

There are also two single row headers on the board:

• J103 (Not mounted): Two pin header that can be soldered in to do current

measurement with an ampere meter. R105 must be unsoldered to enable this

feature.

• J104 (Not mounted): Three pin header that can be soldered in to access the

auxiliary (Miscellaneous) signals from the radio transceiver.

4.1.2 Crystal

A high accuracy 16MHz crystal is mounted and used by the radio transceiver for

carrier frequency generation.

4.1.3 RF Front End

Since the output from the radio transceiver itself is a balanced signal pair, a balun is

needed to transform into a 50Ohm single ended signal fed to the SMA connector.

Johanson Technology provides two pin compatible baluns for the AT86RF230,

AT86RF231 and AT86RF212:

• 2450FB15L0001: 2.45 GHz filter balun optimized for AT86RF230 and

AT86RF231.

• 0896FB15A0100: Sub gigahertz filter balun combination optimized for

AT86RF212.