Wi.M900X/T Drop-In Embedded Wireless
Module
868/915 MHz, 152.34kbit/sec, 32/84 channels
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© 2004, 2005 All Rights Reserved
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Revision A
Typical Applications
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Automated Meter Reading
Security Sensors
Toys
Remote Control
Features
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Instant physical radio solution – no external RF
components required
Simple FCC certification as digital spread spectrum
device
Supports frequency hopping
Based on the XEMICS XE1203F transceiver
Footprint compatible with our Wi.232DTS module
Built data clock recovery
Automatic packet start detection
2.4-3.6 volt operation
1.2 – 152.34kbit/second data rate
SPI style digital serial interface
Factory set 48-bit unique ID
Smallest form factor in the world – under 0.8”
square
Maximum output power – +15dBm
Maximum RF sensitivity – -112dBm
RF sensitivity @ max data rate – -103dBm typ.
TX current = 54mA @ 15dBm typical
RX current = 14mA typical
NV personality memory stores factory calibration,
lot code information, and unique ID
Can be provided with or without a SAW filter.
868, and 915 MHz versions are available
32 wideband and 84 narrow band channels are
available in the 915 MHz version
Description
The Wi.M900X/T module is a
microcontroller-less version of our popular
Wi.232DTS module. It offers the same
excellent RF performance, yet allows the
design engineer to control the radio at the
physical level using any microcontroller.
The module is footprint compatible with the
Wi.232DTS module so upgrading to the
Wi.232DTS is very easy… no PCB changes
are required.
The module supports two modes of
operation: wide-band and narrow-band. In
wide-band mode, the channel width is
600kHz and in narrow-band mode the
channel width is 200kHz.
The module is configured via a simple SPI
style serial interface. Data is transmitted
and received using a separate digital serial
interface that includes pre-amble and start-
of-packet detection.
A typical circuit consists of a low-cost
microcontroller, a power source, a
Wi.M900X/T module, and an antenna.
The WiM900X module is a complete
transceiver while the WiM900T module is
transmit only. In addition, the modules can
be ordered for operation in the 868 MHz
band by substituting 868 for 900. For
example: WiM868X.
2
© 2004, 2005 All Rights Reserved
www.radiotronix.com
Revision A
Document Control
Document Control
Created By
Engineering Review
Marketing Review
Approved –
Engineering
Approved – Marketing
Steve Montgomery
3/4/2005
Revision History
Revision
1.0A
Author
SJM
Date
3/4/2005
Description
Document Created
3
© 2004, 2005 All Rights Reserved
www.radiotronix.com
Revision A
Table of Contents
Typical Applications .......................................................................................................... 2
Features ............................................................................................................................ 2
Description ........................................................................................................................ 2
Document Control ............................................................................................................. 3
Revision History ................................................................................................................ 3
Table of Contents.............................................................................................................. 4
Pin-out Diagram ................................................................................................................5
Mechanical Drawing.......................................................................................................... 5
Pin Descriptions ................................................................................................................ 5
Absolute Maximum Ratings .............................................................................................. 6
Detailed Electrical Specifications ...................................................................................... 6
AC Specifications – RX ................................................................................................. 6
Notes..........................................................................................................................6
AC Specifications - TX................................................................................................... 7
Notes..........................................................................................................................7
DC Specifications .......................................................................................................... 7
Notes..........................................................................................................................7
Functional Description....................................................................................................... 8
Programming Interface.................................................................................................... 10
Non-volatile memory ....................................................................................................... 13
Example circuit................................................................................................................ 14
Ordering Information ....................................................................................................... 15
Contact Information......................................................................................................... 15
4
© 2004, 2005 All Rights Reserved
www.radiotronix.com
Revision A
Preliminary
Preliminary
Pin-out Diagram
Mechanical Drawing
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Name
CLKOUT
EN
SO
SI
SCK
DCLK
DATA
DATAIN
PAT
SWITCH2
SWITCH1
GND
ANT
GND
GND
SDA
SCL
GND
VCC
Description
Clock output from XE1203 – GND on Wi.23DTS
XE1203 Programming port enable
XE1203 Programming port serial output
XE1203 Programming port serial input
XE1203 Programming port clock
XE1203 Data port clock
XE1203 Data input/output – programmable
XE1203 Data input
XE1203 Pattern output – indicates start-of-packet
Transmit enable – controls RF switch
Receive enable – controls RF switch – not used in
transmit only version
Ground
50 ohm antenna power
Ground
Ground
Serial data pin for NV personality memory – I2C bus
Serial clock pin for NV personality memory – I2C bus
Ground
2.4 – 3.6 volt power supply
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© 2004, 2005 All Rights Reserved
www.radiotronix.com
Revision A
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