2: Functional Description
PremierWave® 2050 Through-Hole Adapter Integration Guide
16
Antenna Placement
When designing the PremierWave 2050 to a mating board, it is important to consider the final
installation of the module and its location with respect to connecting access points. The
antenna should be placed so that it has as clear as possible path to the connecting access
point for maximum range. Avoid placing the antenna such that it is blocked by metal walls or
ground planes of adjacent circuit boards.
Serial Interface
The PremierWave 2050 has two external serial interfaces. The signal levels on the serial
interface are 3.3V tolerant. The serial interfaces require an external transceiver in order to
connect to external RS232, RS485, or RS422 networks. The signals of the Serial Ports may be
connected as shown in the reference schematic below. The transceiver shown in the
reference schematic is an Exar product, part number SP336. This transceiver is a multiprotocol
RS232, RS485, RS422 transceiver. Single protocol transceivers may be used as required.
The PremierWave 2050 interface may also be directly connected to the UART interface of an
external CPU.
Table 2-4 PremierWave 2050 Serial Port Signals
Signal
Module Pin
Description
TXD1
5
Serial transmit data output
RTS1
7
Serial ready-to-send / serial transmit enable output
RXD1
9
Serial receive data input
CTS1
11
Serial clear-to-send input
TXD2
21
Serial transmit data output 2
RTS2
23
Serial ready-to-send / serial transmit enable output
RXD2
25
Serial receive data input 2
CTS2
27
Serial clear-to-send input
