APGRD003 Microchip Technology, APGRD003 Datasheet - Page 17

• 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

3.3
© 2006 Microchip Technology Inc.
LOW FREQUENCY INITIATOR MODULE
3.3.1
3.3.2
The LF Transmitter is derived from the design described in Application Note AN232,
"Low Frequency Magnetic Transmitter Design" (DS00232).
The hardware design of the LF Initiator module is identical to the LF module used in
Microchip PKE reference design (APGRD001). Refer to Chapter 2 of the “PKE
Reference Design User Guide” for more information on this module. Refer to
Appendix A. “Schematic and Layouts”.
3.3.3
LF Initiator is connected to Base Station Module through the LIN network. Each LF
Initiator is assigned a unique ID which is also used by the system to distinguish the tire
location during normal operation. Once a command from the Base Station has been
received, the LF Initiator transmits a wake-up challenge to the Transponder Sensor
module via a 125 kHz modulated signal. The format of the signal is user configurable
and also depends on the configurations of the AFE output filter on the Transponder
Sensor module.
Refer to 3.4.3.3 “LF Message Overview” for detail description of the LF message
formatting.
3.3.4
Refer to Recommended Reading in the Preface section.
LF Transmitting Frequency:
Connectivity:
Technical Specifications
System Overview
Operation Overview
Reference Material
125 kHz
LIN or CAN, LIN is used for this design
DS51624B-page 13