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| 型号： | APGRD003 |
| 厂商： | Microchip Technology |
| 文件页数： | 21/42页 |
| 文件大小： | 0K |
| 描述： | KIT TPMS REFERENCE DESIGN |
| 标准包装： | 1 |
| 类型： | 汽车 - 轮胎压力监视器 |
| 频率： | 433.92MHz |
| 适用于相关产品： | PIC18F4680，PIC18F2680，MCP2030 |
| 已供物品： | 基站、低频起始器板和轮胎压力传感器节点 |
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Hardware Overview
3.4.3.1
LEARN MODE OVERVIEW
When a Learn Mode ID is received, the module will save the new Tire Location ID and
use it as its default ID for all future normal transmissions until another Learn Mode ID
is received. This feature can be used to "re-learn" the tires after tire rotations or if a new
Transponder Sensor module has been installed.
Note:
3.4.3.2
Due to the possibility that one LF Initiator can wake up multiple Transpon-
der Sensor modules in a full system setup (4 LF Initiators with 4 Sensor
Modules) during development due to the close proximity, either the
transmitting power of the LF Initiators should be reduced or the distance
between the module sets (1 set = 1 LF Initiator + 1 Transponder Sensor)
should be kept at a maximum where they will not cause interference with
each other. Refer to Application Note AN232 for more details on the LF
Transmitter.
ANALOG FRONT END OVERVIEW
The user configurable output filter of the MCP2030 is utilized to prevent the
microcontroller from being awakened unnecessarily by either noise or LF signals from
other unknown sources. The data is outputted to the microcontroller only when the pre-
amble of the incoming message matches the pre-configured filter settings. The
MCP2030 can be configured via SPI by writing to the seven configuration registers
through the microcontroller. The number of channels enabled can also be controlled
through these configuration registers. Refer to the MCP2030 data sheet (DS21981) for
more information.
3.4.3.3
LF MESSAGE OVERVIEW
The incoming LF message from the LF Initiator Module consists of the following in a
125 kHz modulated format:
?
?
?
?
?
A required minimum of 4 ms ON time for AGC stabilization
A 500 μ s OFF delay
A 2 ms ON time for the output filter (user configurable in AFE)
A 2 ms OFF for the output filter time (user configurable in AFE)
Two bytes of data (maximum of 8 bytes)
- Tire Location ID (user defined)
- System Mode ID (user defined)
FIGURE 3-3:
LF MESSAGE FORMAT
LOGIC ‘ 0 ’
LOGIC ‘ 1 ’
125 kHz Base Frequency
Data
Wake-Up 125 kHz Preamble
Bit
Period
Mode ID (1 byte)
Tire Location ID
(1 byte
2 ms
2 ms
4 ms
Transmission Direction LSb First
? 2006 Microchip Technology Inc.
DS51624B-page 17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| APGRD004 | 功能描述:开发板和工具包 - PIC / DSPIC Auto Ambient Lighting Module RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| APGSABA | 制造商:OMRON AUTOMATION AND SAFETY 功能描述:CUSTOM SHUTTER ASSEMBLY 制造商:OMRON Industrial Automation 功能描述:CUSTOM SHUTTER ASSEMBLY |
| APG-SA-BA | 制造商:OMRON AUTOMATION AND SAFETY 功能描述:CUSTOM SHUTTER ASSEMBLY 制造商:OMRON Industrial Automation 功能描述:CUSTOM SHUTTER ASSEMBLY 制造商:Omron Corporation 功能描述:Custom Shutter Assembly 制造商:OMRON INDUSTRIAL AUTOMATION 功能描述:Custom Shutter Assembly |
| AP-GT1-1P-2428/1.6C(90) | 制造商:Hirose 功能描述:AP-GT1-1P-2428/1.6C(90) |
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