User Manual

AT02876: Atmel REB212BSMA Hardware User Manual [APPLICATION NOTE]
Atmel-42097B-WIRELESS-AT02876-REB212BSMA-Hardware-User-Manual_ApplicationNote_062014
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Figure 4-1. REB212BSMA Block Diagram
REB212BSMA
AT86RF212B
RFP
RFN
RSTN
EXPAND1
XTAL2
XTAL1
XTAL
DIG1
CLKM
Protectio
n
ID
EEPROM
SPI
4
IRQ
SLPTR
DIG4
DIG3
DIG2
TP6
TP7
Balun
JP1
GND
DEVDD
X2
TP5
4.1 Interface Connector
The REB212BSMA is equipped with a 2 × 20-pin, 100mil, expansion connector, X1. The pin assignment enables
a direct interface to the REB-CBB [2]. Further, the interface connects to the Atmel STK500/501 microcontroller
development platform to enable support for various Atmel 8-bit AVR
®
microcontrollers.
The REB212BSMA is preconfigured to interface to an STK501 with an Atmel ATmega1281 or a REB-CBB with
an Atmel ATxmega 256A3 respectively.
To operate the REB212BSMA with an Atmel ATmega644 on STK500, the 0Ω resistors R10 through R18 must be
removed and re-installed on the board manually as resistors R20 through R28 (see Appendix A).
Other microcontroller development platforms need to be interfaced using a special adapter board.
4.1.1 Atmel ATmega1281 Configuration
Table 4-1 lists the pin assignment of the ATmega1281 configuration (shipping default).
Table 4-1. Default Expansion Connector Mapping (ATmega1281 Configuration)
Pin# Function Pin# Function
1 GND 2 GND
3 n.c. 4 n.c.
5 n.c. 6 n.c.
7 n.c. 8 n.c.
9 n.c. 10 n.c.
11 n.c. 12 n.c.