瑞萨电子RX23E-A解决方案入门套件
该套件包括一块已安装有测量传感电路的RX23E-A评估板(RSSK RX23E-A)。 通过可从网站下载的软件一起使用,用户可以立即开始评估模拟功能。 该套件可帮助用户缩短开发周期,加快产品上市时间。
关于RX23E-A
RX 单片机产品家族的RX23E-A产品群具有集成的高精度模拟前端。...
This is a reference design of a system that incorporates 4 pieces of RX23E-A with channel-to-channel isolation and measures temperature and voltage synchronously. This is ideal for applications, such as analog input module with multiple analog inputs, temperature controller, recorder, and data acquisition.
This is a reference design combining high precision AFE mounted MCU RX23E-A and RX72M. RX23E-A performs not only A/D conversion but also distributed processing, such as digital filter processing and conversion of physical quantity. This allows high precision measurement, high speed response, and 4ch synchronous measurement, which have not been realized by the existing discrete ADC before. In addition, the processing load of the host MCU RX72M is reduced so that RX72M focuses on processing that can be performed only by the host.
The cycle of measurement result acquisition is 10msec and the step response time is 70msec. 4ch synchronous measurement can be realized within 1msec. These specifications appear to be adequate for the system that processes signal changing relatively slowly, such as temperature and pressure.
Communication between 4 pieces of RX23E-A and RX72M is performed by a single channel 3-wire serial communication, and individual communications with the specified unit address and the broadcast communication are performed. This can reduce isolators comparing to 4-wire SPI communication which uses chip select.
To isolate communication, CMOS output photocoupler RV1S9260A and open collector output type photocoupler PS9124 are used. RV1S9260A is used for SCK and MOSI. PS9124 is used for MISO. The open collector output type photocoupler PS9124 is Hi-z when output of RX23E-A is High or Hi-z. As a result, MISO communication line is not occupied and available for bus communication.
The isolated power supply is configured with a synchronous buck regulator ISL85410 and an isolation transformer with 1 input 2 output. In this configuration, 2 channels of isolated power supply are provided with a single power supply IC and a transformer.
该套件包括一块已安装有测量传感电路的RX23E-A评估板(RSSK RX23E-A)。 通过可从网站下载的软件一起使用,用户可以立即开始评估模拟功能。 该套件可帮助用户缩短开发周期,加快产品上市时间。
RX 单片机产品家族的RX23E-A产品群具有集成的高精度模拟前端。...
博客 | 2021年9月25日 |