APGRD003 Microchip Technology, APGRD003 Datasheet - Page 15

• Manufacturer Part Number: APGRD003
• Description: KIT TPMS REFERENCE DESIGN
• Manufacturer: Microchip Technology
• Type: Automotive, Tire Pressure Monitorr

Specifications of APGRD003

• Frequency: 433.92MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PIC18F4680, PIC18F2680, MCP2030
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

3.1
3.2
© 2006 Microchip Technology Inc.
INTRODUCTION
BASE STATION MODULE OVERVIEW
The following section provides and overview of the hardware used in the Tire Pressure
Monitoring System.
3.2.1
3.2.2
The microcontroller implemented is a PIC18F4680 for this module based on the
number of features offered by this device. The PIC18F4680 has both a CAN controller
and a LIN compatible EUSART to interface to in-vehicle networks.
3.2.3
The RF input is an AM super-regenerative compact hybrid module, that is used to
capture decoded data from an AM Transmitter. The receiver has very high frequency
stability over a wide operating temperature and tolerant of mechanical vibrations or
manual handling. A laser trimmed on board inductor, removes the need for any
adjustable components.
3.2.4
A standard 16 pin 2x16 monochromes LCD is used to display the tire pressure and
temperature data
3.2.5
A MCP201 LIN transceiver and a MCP2551 CAN transceiver are provided on board to
provide a way of connecting to LIN or CAN networks. This reference design uses the
LIN to communicate between the Base Station and the LF Initiator(s) that is/are
connected to the LIN network. The capacitor between the LIN bus pin and ground
should have its value adjusted for the particular network topology. A large pull-up
resistor on the nFault/SLPS pin ensures that the device resets to a standard slope
control profile. Refer to the MCP201 Data Sheet, “LIN Transceiver with Voltage
Regulator” (DS21730) for more information. Refer to Appendix A. “Schematic and
Layouts”.
UHF Receiving Frequency:
Normal Operating Voltage:
Normal Operating Current:
Communication Protocols:
Liquid Crystal Display (LCD): 2x16
Chapter 3. Hardware Overview
Technical Specifications
Microcontroller
UHF Receiver
LCD
Connectivity
TIRE PRESSURE MONITORING
433.92 MHz
9 - 18V
~ 64 mA
CAN and LIN
SYSTEM USER’S GUIDE
DS51624B-page 11