AT86RF233 datasheet(13/196 Pages) ATMEL

13 / 196 page

8351B–MCU Wireless–06/12

AT86RF233

In this example, a balun (B1) transforms the differential RF signal at the

Atmel AT86RF233 radio transceiver RF pins (RFP/RFN) to a single ended RF signal,

similar to the Basic Application Schematic; refer to Figure 5-1. During receive mode the

radio transceiver searches for the most reliable RF signal path using the Antenna

Diversity algorithm. One antenna is selected (SW2) by the Antenna Diversity RF switch

control pin 9 (DIG1), refer to Section 11.4.

The RX signal is amplified by an optional low-noise amplifier (N2) and fed to the radio

transceiver using the RX/TX switch (SW1). During transmit mode the AT86RF233 TX

signal is amplified using an external PA (N1) and fed to the antennas via an RF switch

(SW2). These switches are controlled by the RX/TX Indicator, represented by the

differential pin pair DIG3/DIG4, refer to Section 11.5.

RX and TX Frame Time stamping is implemented through pin 10 (DIG2), refer to

Section 11.6.

The Security Module (AES), Random Number Generator, High Data Rate Modes,

Frame Buffer Empty Indicator, Dynamic Frame Buffer Protection, Alternate Start-Of-

Frame Delimiter or Reduced Power Consumption Mode (RPC) do not require specific

circuitry to operate, for details refer to Section 11.1, Section 11.2, Section 11.3,

Section 11.7, Section 11.8, Section 11.9 and Section 11.10.

AT86RF233 Datasheet(PDF) 13 Page - ATMEL Corporation