Active RL78/G23 MCU with 384 KB flash and industrial temperature range
The Renesas R7F100GMK3CFB#AA0 is an active-production 16-bit MCU from the RL78/G23 series, running at 32 MHz with 384 KB of flash program memory, 32 KB of RAM, and 8 KB of on-chip EEPROM. The -40 to 105 °C operating temperature range qualifies it for industrial and automotive body applications where the ambient temperature exceeds the commercial 85 °C ceiling — motor-drive enclosures, outdoor telemetry units, and under-hood modules all sit within this envelope.
Peripheral set and analog integration for sensor and HMI designs
On-chip peripherals include capacitive touch sensing, LVD, POR, PWM, and WDT — the touch engine handles up to 36 channels without an external controller, which simplifies the BOM for front-panel keypads or proximity-slider interfaces. Connectivity covers CSI, I²C, LINbus, SPI, and UART/USART, making the part a fit for CAN-adjacent body networks (LIN) and sensor buses (I²C/SPI) in a single chip. The 17-channel ADC offers selectable 8-, 10-, or 12-bit resolution, plus two 8-bit DAC outputs — enough analog front-end for multi-sensor acquisition (thermistor, strain gauge, potentiometer) without external muxing. 70 GPIOs in the 80-LQFP package provide headroom for parallel LCD data buses, keypad matrix scanning, or multiple serial interfaces running concurrently.
Memory sizing and firmware-fit check
384 KB of flash (384K x 8) supports mid-complexity firmware — a full RTOS with TCP/IP stack, a capacitive-touch library, and a sensor-fusion algorithm typically fits within 200-250 KB, leaving margin for field-update staging. 32 KB of RAM (32K x 8) is adequate for moderate data buffering; applications that log sensor data or maintain large look-up tables should verify the heap/stack budget against the 32 KB ceiling. 8 KB of dedicated EEPROM (8K x 8) stores calibration constants and configuration parameters without wearing the flash — useful for products that require field recalibration or serial-number retention.
Package, compliance, and sourcing posture
Tray packaging is standard for this order code. ROHS3 compliant — no substance exemptions expiring in the near term, so the part clears EU and UKCA material restrictions without a waiver.