CXPI 차량 통신 트랜시버 -BD41000AFJ-C
(CXPI CLICK)
개요
- 본 제품은 CXPI 차량 통신 트랜시버 -BD41000AFJ-C 모듈입니다.
- 7-18V 외부 파워로 동작하며, 쉽게 마스터/슬레이브 모드 스위칭이 가능합니다.
- UART인터페이스를 가지고 있으며, 3.3V/5V와 동작합니다.
특징
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CXPI Click is based on the BD41000AFJ-C, a transceiver for the Clock Extension Peripheral Interface (CXPI) communication from Rohm Semiconductor. The BD41000FJ-C is compliant with the CXPI standard established by JSAE (Society of Automotive Engineers of Japan), enabling highly responsive, reliable multiplex communication even in HMI systems, reducing vehicle weight and contributing to greater fuel efficiency. The BD41000AFJ-C operates from 7V to 18V external power supply labeled as BAT, and has several operating modes each controlled by the CS pin of the mikroBUS™, BUS pin, and UART TX pin.
It has built-in Power-OFF, Through, RX Through other than CODEC Mode for power saving control. Power-OFF Mode reduces power consumption by not supplying power to any circuits other than necessary ones for Wake-Up pulse detection (BUS) and Wake-Up input detection (TX). Through Mode does not process Coding/Decoding. It only drives signals from UART TX to BUS and from BUS to UART RX directly. RX Through Mode reverses RX output at each rising edge of BUS. CODEC Mode is the mode of CXPI communication. CS pin of the mikroBUS™ socket labeled as EN should be set high for the chip to enter CODEC Mode.
The BD41000AFJ-C can achieve a quiescent current of 3uA (typ.), ensuring suitability with automotive applications. As a result, the battery load is minimized during non-operation, contributing to higher energy savings. Also, high ESD resistance (±8kV) makes it possible to achieve low-power, high-reliability CXPI communication. Besides, it has built-in fail-safe functions that suspend the output data upon detection of under-voltage or temperature abnormality.
CXPI Click communicates with MCU using the UART interface with a transmission speed range from 5kbps to 20kbps, and commonly used UART RX and TX pins for the data transfer. Also, it has three jumpers that allow the selection of CXPI transmitter mode on the MS pin of the BD41000AFJ-C to its appropriate position marked as Master or Slave. This can be performed by using the SMD jumpers labeled as MODE. Note that all the jumpers must be placed to the same side, or else the Click board™ may become unresponsive.
This Click board™ is designed to be operated with both 3.3V and 5V logic voltage levels that can be selected via VCC SEL jumper. This allows for both 3.3V and 5V capable MCUs to use the UART communication lines properly. However, the Click board™ comes equipped with a library that contains easy to use functions and an example code that can be used as a reference for further development.
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Type CXPI Applications Can be used in body control applications, including steering switch, AC, and instrument panel systems. On-board modules CXPI Click is based on the BD41000AFJ-C, a transceiver for the Clock Extension Peripheral Interface (CXPI) communication from Rohm Semiconductor. Key Features CXPI standards qualified, transmission speed range from 5kbps to 20kbps, Master/Slave switching function, power saving function, data arbitration function, built-in UVLO and TDS function, and more. Interface PWM,UART Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V