User Manual

Atmel AT03911: REB233CBB Module – User Manual [APPLICATION NOTE]

42156BWIRELESS02/2014

5. Functional description

The block diagram of the REB233CBB Module is shown in Figure 5-1. The Radio PCB and Microcontroller PCB are

connected via a mounting header. The Radio PCB is not functional without connecting it correctly to the Microcontroller

PCB. The Radio PCB is equipped with two approved antennas; see B.3 and [2], to enable antenna diversity (AD)

operation.The Microcontroller PCB controls the Radio PCB, provides the power supply as well as the user interface. The

user interface consists of three LEDs and two pushbuttons for manual user control of the module. Additional

microcontroller (MCU) GPIOs, like USART, UART and JTAG, are available to control the module with a host-PC.

Figure 5-1. REB233CBB Module block diagram

AT86RF233

SMA1

SMA2

ANT1

ANT2

GPIORF1

SPI

Switch

RF2

ATxmega256A3

Battery

Interface

LEDs

Buttons

Radio PCB Microcontroller PCB User Interface

The two REB233CBB Module components, the Radio PCB, equipped with two swivel antennas, and Microcontroller

PCB, are shown in detail in Figure 5-2. Here, the REB233CBB Module is dismounted for better explanation of all

important hardware features.

Figure 5-2. REB233 Module features (dismounted view for better description)

Radio PCB

Microcontroller PCB

Battery holder

JTAG

Power switch

UART