Renesas R5F1214CMNA#00

Overview

R5F1214CMNA#00 from Renesas Electronics is a 16-pin HWQFN-packaged RL78/G16 16-bit microcontroller with 32 KB code flash, 2 KB RAM, and industrial-grade operation up to +125°C. It integrates capacitive touch sensing (15 channels), 10-bit A/D converter (11-channel analog input), real-time clock with calendar, and low-power STOP/HALT modes - deployed in motor control interfaces and industrial HMI panels.

For engineers reviewing the R5F1214CMNA#00 datasheet, R5F1214CMNA#00 pinout, R5F1214CMNA#00 application, or R5F1214CMNA#00 equivalent, key selection criteria include its 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) footprint, −40°C to +125°C temperature rating (M-grade), 32 KB flash/2 KB RAM memory configuration, and integrated CTSU for touch-button systems requiring minimal external components.

Technical Context

The R5F1214CMNA#00 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.0625 μs (@16 MHz high-speed on-chip oscillator) to 30.5 μs (@32.768 kHz subsystem clock). It features dual-clock domains: high-speed on-chip oscillator (1–16 MHz selectable, ±1.5% accuracy at TA = −40 to +125°C) and dedicated low-speed on-chip oscillator for watchdog and RTC.

Peripheral integration includes eight 16-bit timers, one 12-bit interval timer, one watchdog timer, one 99-year real-time clock with alarm and correction, and serial interfaces: up to three simplified SPI (CSI), three UART, three simplified I²C, and one full I²C channel - all configurable via peripheral I/O redirection registers (PIOR).

Key Specifications

Pinout & Package

16-pin HWQFN package (3 × 3 mm, 0.5-mm pitch) with exposed die pad requiring PCB thermal pad connection (no electrical connection). Pin functions are multiplexed and configurable via PIOR registers.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F1214CGNA#00 and R5F1214AMNA#00, the R5F1214CMNA#00 uniquely combines 32 KB flash, 125°C operation, and industrial-grade data flash endurance (1M rewrites), making it optimal for thermally demanding applications requiring future firmware scalability.

Availability

R5F1214CMNA#00 is available at Aetrix Electronics and suitable for industrial motor control interfaces, smart appliance HMI panels, energy meter communication modules, and industrial sensor node controllers requiring stable component supply across extended temperature ranges.

Supply support for R5F1214CMNA#00 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RL78/G16 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive industrial HMI, motor control, and sensor nodes - balancing performance, integration, and thermal robustness.

FAQ

What is the maximum operating frequency of the R5F1214CMNA#00?

The R5F1214CMNA#00 supports a maximum system clock frequency of 32 MHz using the high-speed on-chip oscillator at 16 MHz with 2× PLL multiplication. Its minimum instruction execution time is 0.0625 μs at 16 MHz operation, confirmed in the RL78/G16 datasheet Rev.1.30. The R5F1214CMNA#00 does not require external clock sources to achieve full performance.

Does the R5F1214CMNA#00 support in-application programming (IAP) of its flash memory?

Yes, the R5F1214CMNA#00 supports self-programming of both code and data flash memory without boot swap functionality. It includes flash shield window protection and allows erase/write operations while the CPU executes from other memory regions. This capability is documented in the R5F1214CMNA#00 datasheet section "Code flash memory" and enables secure field firmware updates.

How many capacitive touch channels does the R5F1214CMNA#00 support, and what configurations are available?

The R5F1214CMNA#00 integrates a capacitive touch sensing unit (CTSU) supporting up to 15 self-capacitance channels or 16 mutual-capacitance channels using matrix configuration. All 15 TSCAP-capable pins are accessible on its 16-pin HWQFN package, and configuration is managed via dedicated CTSU registers. This is explicitly specified in the "Capacitive touch sensing unit (CTSUb)" feature list of the R5F1214CMNA#00 datasheet.

What is the accuracy of the high-speed on-chip oscillator in the R5F1214CMNA#00 over its full temperature range?

The high-speed on-chip oscillator in the R5F1214CMNA#00 maintains ±1.5% frequency accuracy across the full operating range of −40°C to +125°C (M-grade), as specified in the "High-speed on-chip oscillator" section of the R5F1214CMNA#00 datasheet Rev.1.30. This applies to all selectable frequencies (1–16 MHz) under VDD = 2.4–5.5 V conditions.

Can the R5F1214CMNA#00 operate reliably in environments exceeding +105°C?

Yes, the R5F1214CMNA#00 is specifically rated for continuous operation from −40°C to +125°C (M-grade), validated per industrial qualification standards. This exceeds the +105°C limit of G-grade variants like R5F1214CGNA#00 and makes the R5F1214CMNA#00 suitable for under-hood automotive subsystems and high-temperature industrial enclosures where thermal derating is critical.