ER400TRS Datasheet, PDF (2/7 Pages) List of Unclassifed Manufacturers – LPRS Prelimina ry Data Sheet

LPRS Prelimina ry Data Sheet
Easy -Radio ER400TRS Transceiver
Application & Operation
Figure 2 shows a typical system block diagram comprising hosts (user’s application) connected to Easy-
Radio Transceivers. The hosts (A & B) will be monitoring (collecting data) and/or controlling (sending data) to
some real world application.
Host
(A)
Serial Data Output
Serial Data Input
Busy
Host Ready
Easy-Radio
Transceiver
(A)
RF Link
Easy-Radio
Transceiver
(B)
Serial Data Output
Serial Data Input
Busy
Host Ready
Host
(B)
Figure 2 Typical System Block Diagram
The hosts provide serial data input and output lines and two ‘handshaking’ lines that control the flow of data
to and from the Easy-Radio Transceivers. The ‘Busy’ output line, when active, indicates that the transceiver
is undertaking an internal task and is not ready to receive serial data. The ‘Host Ready’ input is used to
indicate that the host is ready to receive the data held in the buffer of the Easy-Radio Transceiver.
The host should check before sending data that the ‘Busy’ line is not high, as this would indicate that the
transceiver is either transmitting or receiving data over the radio link. It should also pull the ‘Host Ready’ line
low and check that no data appears on the Serial Data Output line.
Detailed operation of interfacing, handshaking (including timing) is described in the ‘Easy-Radio Software
Guide’.
14.0mm
37.0mm
Top View
4.0mm
Pin Out
15.46mm
12
34 5 67 8 9
Pin Pitch 2.54 mm PCB Hole Size 1.0 mm
Pin Description
Pin Name
No
Description
Notes
1
Antenna
2
RF Ground
3
RSSI
4
Busy Output
5
Serial Data Out
6
Serial Data In
Easy-Radio ER400TS-RS 1.3
50 Ohm RF input/output. Connect to suitable antenna.
RF ground. Connect to antenna ground (coaxial cable screen
braid) and local ground plane. Internally connected to other
Ground pins.
Received Signal Strength Indication
Digital Output to indicate that transceiver is ready to receive
serial data from host.
Digital output for received data to host
Digital input for serial data to be transmitted
Copyright LPRS 2002. Iss. 1-3 September 2003
See Note
See Note
CTS function
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