Atmel AVR10004: RCB256RFR2 – Hardware User Manual [APPLICATION NOTE]
5
3.
Mechanical Description
RCBs demonstrating radio transceiver and microcontroller capabilities are equipped with two 50mil, 30-pin connectors
(ETX0/1), separated by 22mm from each other, to interface to various port extension boards (base boards).
The RCB256RFR2 has no on-board antenna, and so it is not required to separate the board into an electronics section
and an antenna section. When used with a quarter-wave antenna mounted at the SMA connector, the board will act as
a ground plane for the antenna.
The other mounting hole is reserved for a battery holder. If battery operation is required, base boards should not make
use of this mount.
3.1
Mechanical dimensions
shows the EXT0/1 interface connector positions referenced to pin 1, as most CAD tools use this pin as a
placement reference. Pay attention to the connector key location at pin 30 and the mirrored placement of a male
counterpart connector when designing a new base board. The connector pin 1 is marked using a rectangular pad. See
The PCB is made of standard 1.5mm FR4 material with two copper layers. Due to the panelization and cutting process,
the dimension of the outer board edge may vary up to ±0.1mm.
Figure 3-1. RCB256RFR2 – mechanical drawing (dimensions in mm).
