32 MHz RL78 core with 192 KB flash — memory headroom for mixed-signal control
The R7F100GMH2DFA#AA0 is a 16-bit RL78/G23 microcontroller running at 32 MHz, with 192 KB of on-chip flash and 20 KB of RAM. That flash budget comfortably holds a capacitive-touch firmware stack plus a Modbus RTU slave or LIN node, while the 20 KB RAM leaves room for a moderate-size buffer and the application heap. An additional 8 KB of on-chip EEPROM eliminates the need for an external serial EEPROM for parameter storage — calibration constants, node addresses, or touch threshold tables live on the MCU without a separate memory IC.
70 I/O in an 80-LQFP — peripheral mix for sensor and human-machine interface
The 80-LQFP package (14x14 mm body) brings out 70 general-purpose I/O. That count supports a 7-segment display multiplex, a 4x4 matrix keypad, and a dozen discrete sensor inputs while still leaving pins for serial communication. On-chip peripherals include a 17-channel ADC that can be configured for 8-, 10-, or 12-bit resolution, plus dual 8-bit DACs. This suits applications that read multiple analog sensors (thermistors, potentiometers, current shunts) and output a control voltage or analog setpoint. Serial connectivity covers CSI, I²C, LINbus, SPI, and UART/USART — enough to interface with external ADCs, motor drivers, or a host controller over a LIN bus in automotive or industrial sub-systems. Built-in capacitive touch sensing, LVD, POR, and WDT reduce external component count. The internal oscillator eliminates a crystal for many applications, though an external clock can be used when tighter timing accuracy is needed.