Gas meters require monitoring of various sensor information to measure gas usage and to safely supply gas, an LCD display function to show this information and a data communication function to communicate with external devices. Also, these functions must stably operate with limited battery capacity for the period specified.

To support various LCD panels, Renesas offers a lineup of RL78/L1x microcontrollers (MCUs) which support three LCD drive voltage generation methods (external resistance division method, internal voltage boosting method and capacitor split method). In addition, Renesas offers the RL78/H1D MCUs which are equipped with UART and can communicate up to 19200bps with subsystem clock (38.4kHz), sampling output timer/detector function suitable for rotation detection by magnetoresistive (MR) sensor, and is suitable for diaphragm gas meter construction.

Gas Meter

Related Products

Block Semiconductor Device Recommended Products Features
Main Controller MCU RL78/L1x 32MHz, 16-bit, true low power, on-chip LCD controller/driver
RL78/H1D 32MHz, 16-bit, true low power, on-chip LCD controller/driver, on-chip timer for MR sensor
Communication Sub-GHz RF Transceiver RAA604S00 RF frequency range: 863MHz to 928MHz, IEEE802.15.4g / 4e compliant hardware function
MCU Built-in Sub-GHz RF Transceiver RL78/G1H 32MHz, 16-bit CPU, RF frequency range: 864MHz to 928MHz


文档标题 language 类型 文档格式 文件大小 日期
RL78/L13 Low power consumption of LCD drive Using Voltage Detector (LVD) Rev.1.00
相关文件: 样例程序
日本語 应用文档 PDF 862 KB
RL78 Troubleshooting of the LCD controller/driver Rev.1.00 日本語 应用文档 PDF 269 KB
RL78/I1D Serial Array Unit (UART Communication) CC-RL Rev.1.00
相关文件: 样例程序
日本語 应用文档 PDF 409 KB
RL78/L13 Integrate External EEPROM IC Functionality into MCU by Using Data Flash Memory (EEPROM Emulation Library) Rev.1.00
相关文件: 样例程序
日本語 应用文档 PDF 940 KB