Renesas R4F20114NFA#U0

Overview

R4F20114NFA#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny family, designed for embedded control in resource-constrained industrial and consumer systems. It integrates 128 KB flash memory, 8 KB RAM, a 32 MHz max CPU clock, 16-channel 10-bit ADC, and supports CAN 2.0B interface via on-chip controller. It operates across −40°C to +85°C and targets motor control and sensor interface applications.

For engineers reviewing the R4F20114NFA#U0 datasheet, R4F20114NFA#U0 pinout, R4F20114NFA#U0 application, or R4F20114NFA#U0 equivalent, key selection criteria include its H8S CPU core compatibility, integrated CAN transceiver support (with external PHY), flash endurance (10,000 write/erase cycles), and availability in 100-pin LQFP package with 79 general-purpose I/O pins.

Technical Context

The R4F20114NFA#U0 implements the H8S/2000-series CPU core with 16-bit data bus and 24-bit address space, supporting advanced mode operation with 32-bit register extensions. It includes a programmable clock pulse generator (CPG) with PLL, multiple low-power modes (HALT, STOP, WAIT), and on-chip debug support via JTAG interface.

Peripheral integration includes three 16-bit timer units (with input capture/output compare), two serial communication interfaces (SCI) supporting UART and LIN, one I²C bus interface, and a dedicated CAN controller compliant with ISO 11898-1:2003. The device uses a unified memory map with separate instruction and data spaces mapped into linear address space.

Key Specifications

Pinout & Package

R4F20114NFA#U0 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow Renesas standard H8S/Tiny pinout layout, supporting multiplexed peripheral functions per pin group.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20114NFA#U0, R4F20115NFA#U0 offers more memory but removes CAN functionality-making it unsuitable for networked control without added components-while R5F52108ADFP#30 delivers architectural advancement and CAN FD at the cost of migration effort and higher BOM cost.

Availability

R4F20114NFA#U0 is available at Aetrix Electronics and suitable for motor control systems, industrial sensor nodes, automotive body controllers, and home appliance UI modules requiring stable component supply and long-term industrial-grade support.

Supply support for R4F20114NFA#U0 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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for industrial, automotive, and infrastructure markets.

The H8S/Tiny series-including R4F20114NFA#U0-is engineered for cost-sensitive, high-reliability embedded control applications where deterministic real-time response, integrated peripherals, and long product lifecycle are critical.

FAQ

What is the maximum operating frequency of the R4F20114NFA#U0?

The R4F20114NFA#U0 supports a maximum CPU clock frequency of 32 MHz when using the on-chip PLL with an external crystal or clock source. This frequency is achievable across the full industrial temperature range (−40°C to +85°C) under specified VCC conditions. The R4F20114NFA#U0's clock pulse generator allows flexible configuration of system clocks for peripherals independently of the CPU clock, enabling optimized power/performance trade-offs.

Does the R4F20114NFA#U0 include an integrated CAN transceiver?

No, the R4F20114NFA#U0 includes only a CAN protocol controller compliant with ISO 11898-1:2003-not a physical layer transceiver. It provides CANTX and CANRX signals that require connection to an external CAN transceiver (e.g., TJA1040 or SN65HVD230) for bus termination, differential signaling, and fault protection. This architecture allows design flexibility in selecting transceivers based on voltage levels, ESD rating, and bus topology requirements.

How much flash memory does the R4F20114NFA#U0 have, and what is its endurance?

The R4F20114NFA#U0 contains 128 KB of on-chip flash memory with guaranteed endurance of 10,000 write/erase cycles and data retention of 20 years at 85°C. Flash is organized in 128-byte blocks, supporting fine-grained updates without erasing entire sectors. The R4F20114NFA#U0 also supports in-application programming (IAP), allowing firmware updates via CAN or SCI without external programmer intervention.

What debug interface does the R4F20114NFA#U0 support?

The R4F20114NFA#U0 supports IEEE 1149.1-compliant JTAG interface for boundary scan testing, flash programming, and real-time in-circuit debugging. It enables full visibility into CPU registers, memory, and peripheral states during development. The R4F20114NFA#U0 does not support SWD or serial wire debug; JTAG is the sole standardized debug channel, requiring compatible tools such as Renesas E2 emulator or third-party JTAG adapters with H8S-specific firmware support.

Is the R4F20114NFA#U0 qualified for automotive applications?

The R4F20114NFA#U0 is rated for industrial temperature range (−40°C to +85°C) and classified as "Standard" quality grade per Renesas documentation, meaning it is intended for applications such as industrial equipment, office automation, and consumer appliances-not automotive safety-critical systems. While it may function in some automotive environments, Renesas does not guarantee AEC-Q100 qualification for R4F20114NFA#U0, and its use in vehicle subsystems requires independent validation and risk assessment.