DOC-0422-010 Rev B. 08/31/07
REIMS Module
Application Module for the Freescale MXYP8300
Hardware User Guide
Reference Documentation:
1) Freescale example REIMS application software and documentation for MXYP8300
specific application notes.
2) Freescale MXYP8300 device reference manuals for detailed device operation and
electrical specifications.
Table of Contents
Cautionary Notes: ........................................................................................................................... 2
Terminology.................................................................................................................................... 3
Module Features ............................................................................................................................. 3
REIMS Module Block Diagram ..................................................................................................... 4
Operational Description.................................................................................................................. 4
PWR_EN Option ............................................................................................................................ 5
J1 Connector – Development Access Port...................................................................................... 5
Battery............................................................................................................................................. 5
Axiom Manufacturing • 2813 Industrial Lane • Garland, TX 75041
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Email: Sales@axman.com Web: http://www.axman.com
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REIMS Module Hardware User Guide
Cautionary Notes:
1) Electrostatic Discharge (ESD) prevention measures should be applied whenever
handling this product. ESD damage is not a warranty repair item.
2) Axiom Manufacturing reserves the right to make changes without further notice to
any products to improve reliability, function or design. Axiom Manufacturing does
not assume any liability arising out of the application or use of any product or circuit
described herein; neither does it convey any license under patent rights or the rights
of others.
3) EMC Information on the REIMS Module:
a) This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
1) This device may not cause harmful interference, and
2) This device must accept any interference received, including interference that
may cause undesired operation.
TX FCC ID# TFY042201 (315Mhz version)
TX FCC ID# TFY042202 (434Mhz version)
b) Changes or modifications to this unit not expressly approved by Axiom
Manufacturing, could void the user’s authority to operate this equipment under
FCC or other regulatory agency rules.
c) This product is designed and intended for use as an application development or
evaluation platform in an educational or professional laboratory. This product is
not intended for application or installation in end user equipment or systems.
d) In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate prevention measures.
e) RF Exposure – This device exceeds the FCC requirements for RF exposure when
the antenna used for this transmitter has a separation distance of at least 20cm
from all persons and must not be co-located or operating in conjunction with any
other antenna or transmitter.
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REIMS Module Hardware User Guide
Terminology
This module applies option selection jumpers. Terminology for application of the option
jumpers is as follows:
Jumper on, in, or installed = jumper is a plastic wired shunt that fits across 2 pins
and the shunt is installed so that the 2 pins are connected with the shunt.
Jumper off, out, or idle = jumper or shunt is installed so that only 1 pin holds the
shunt, no 2 pins are connected, or jumper is removed. It is recommended that
the jumpers be placed idle by installing on 1 pin so they will not be lost.
Signal names in this document that are followed by an asterisk (*) denote an active-low
signal.
Module Features
The REIMS Module is a demonstration, evaluation, or application development platform
for the Freescale MXYP8300 device. Module operation is controlled by dedicated
firmware contained in the MXYP8300 memory. The MXYP8300 provides air pressure,
temperature, and accelerometer measurements with a 315MHz or 434MHz RF
transmitter and 125KHz LF receiver. Typical application would be to monitor and
transmit tire pressure and status in a vehicle Tire Pressure Monitoring System (TPMS).
The device is well suited for many industrial monitoring or safety applications.
The Module applies an embedded RF antenna and does not provide external
connections for measurements, RF, or LF signals. Access to the MXYP8300 device is
provided by an adapter cable and the J1 development port connector. A HCS08 BDM
cable with 2.5 to 3.3V I/O may be applied, see the J1 Development Port section for
more details.
The module is a component of the Freescale REIMS TPMS demonstration kit. See the
kit documentation for a system overview and demonstration operation details.
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REIMS Module Hardware User Guide
j
REIMS Module Block Diagram
PWR_EN
option
umper
MXYP83003V Battery
Integrated
PCB RF
antenna for
315 or
434Mhz
transmitter
J1
Development
Port
125KHz
receiver
coil
Operational Description
The REIMS Module is a basic demonstration platform for the MXYP8300 device. Two
module configurations are available, 315MHz and 434MHz transmit frequency versions.
All other features and operational characteristics are the same for the modules. The
MXYP8300 device integrates pressure, temperature, and accelerometer sensors with a
HCS08 MCU, wireless ISM band RF transmitter, and wireless LF band 125KHz
receiver. Typical application provides for measurement data to be transmitted to a
system host. The transmissions are sent at a slightly random time interval greater than
10 seconds and/or may be keyed by reception of a 125KHz LF reception. Either
method will meet Agency approval requirements for transmitter certification.
Module power is derived from the on-board 3V battery. The MXYP8300 monitors the
battery and will not operate or transmit if too low. Option JP1 allows the module to be
powered on or off. During development port connection the BDM may provide 3.3V to
the module to save the battery. The transmitter should not be applied during
development port connection due to possible RF coupling into the development cable.
Agency approved operation of the transmitter applies fixed power setting with +/-35KHz
FSK modulation from center carrier frequency. The module 125KHz receiver coil
should be at least 6 inches from the 125KHz transmitter applied or overdriving the
detector is possible.
The REIMS TPMS demonstration software and application documentation package
provides all necessary functions, operations, and controls to operate the module
correctly. Preset software definitions and C language function calls provide an easy
method to modify or adjust operation for particular applications. Default software
settings for TX Power or Frequency must not be modified or the module Agency
approvals are void and the application may violate government regulations.
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REIMS Module Hardware User Guide
PWR_EN Option
PWR_EN installed on both pins will power the module from the battery. Always idle the
PWR_EN option when the module is not being applied or unnecessary battery life loss
will occur. Always open PWR_EN when connecting the J1 development port. For best
operation of the module with development port application is to provide 3.3V via the
BDM connection (PWR_EN OPEN).
J1 Connector – Development Access Port
J1 provides BDM connection to the HCS08 microcontroller in the MXYP8300 device.
An adapter cable is provided in the demonstration kit to allow a standard BDM cable to
be applied.
Battery
The battery is a lithium coin cell type, model CR2325 or same. If the module does not
operate, the battery voltage should be measured with a suitable voltmeter and replaced
if the voltage is at or below 2.7V. W
Refer to the referenced internet web sights for additional applications information.
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