Renesas R4F20335RNFE#V0

Overview

R4F20335RNFE#V0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny series, designed for embedded control applications requiring integrated peripherals, low-power operation, and deterministic real-time response. It features 128 KB on-chip flash memory, 8 KB RAM, a 32 MHz max CPU clock, 48-pin LQFP package, and supports CAN 2.0B interface via dedicated controller.

For engineers reviewing the R4F20335RNFE#V0 datasheet, R4F20335RNFE#V0 pinout, R4F20335RNFE#V0 application, or R4F20335RNFE#V0 equivalent, key selection criteria include flash endurance (100K write/erase cycles), watchdog timer with windowed mode, 12-bit ADC with 8-channel input, CAN bus timing compliance (ISO 11898-1), and support for H8S/2000-series instruction set compatibility.

Technical Context

The R4F20335RNFE#V0 implements the H8S/2000 CPU core with 16-bit data bus and 24-bit address space, supporting advanced mode for extended addressing and enhanced interrupt handling. It integrates a programmable clock pulse generator (CPG) with PLL, low-voltage detection (LVD), and on-chip debug interface compliant with IEEE 1149.1 (JTAG).

Peripheral integration includes two serial communication interfaces (SCI) with UART/lin functionality, one I²C bus interface, one synchronous serial unit (SSU), and a 16-bit data transfer controller (DTC) supporting DMA-like transfers without CPU intervention. The CAN controller operates independently of the main CPU clock domain and supports both standard and extended frame formats.

Key Specifications

Pinout & Package

48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions conform to Renesas H8S/20335R Group specification Rev.3.00 (Sep 2012). All pins support 5 V tolerant inputs when VCC ≥ 4.5 V.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20323RNFE#V0 and R4F20235RNFE#V0, the R4F20335RNFE#V0 provides higher memory capacity, full CAN 2.0B feature set, and faster clock synthesis-making it the only option among the three for complex, networked industrial controllers requiring deterministic message handling and firmware scalability.

Availability

R4F20335RNFE#V0 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, building automation gateways, and medical diagnostic equipment requiring stable component supply across long-lifecycle programs.

Supply support for R4F20335RNFE#V0 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 the R4F20335RNFE#V0-is engineered for cost-effective, high-reliability embedded control in resource-constrained environments where CAN connectivity, low-power operation, and long-term supply stability are essential.

FAQ

What is the maximum operating frequency of the R4F20335RNFE#V0?

The R4F20335RNFE#V0 supports a maximum CPU clock frequency of 32 MHz, achieved using its integrated PLL-based clock pulse generator (CPG) with external crystal input (1–8 MHz). This frequency is guaranteed across the full industrial temperature range (–40°C to +85°C) and supply voltage (2.7 V to 5.5 V). The R4F20335RNFE#V0's CPG allows dynamic clock switching between internal high-speed OCO (20 MHz) and PLL-multiplied sources without system reset.

Does the R4F20335RNFE#V0 include an integrated CAN transceiver?

No, the R4F20335RNFE#V0 integrates a CAN 2.0B protocol controller but requires an external CAN transceiver (e.g., TJA1042 or SN65HVD230) for physical layer signaling. Its CANTX and CANRX pins provide differential logic-level outputs compatible with industry-standard transceivers. The R4F20335RNFE#V0 handles message arbitration, error detection, and automatic retransmission in hardware-reducing CPU load versus software-implemented CAN stacks.

What debug interface does the R4F20335RNFE#V0 support?

The R4F20335RNFE#V0 supports IEEE 1149.1-compliant JTAG for on-chip debugging, including real-time trace, hardware breakpoints, and non-intrusive program execution monitoring. It uses dedicated pins (TCK, TMS, TDI, TDO, TRST) and requires no additional firmware overhead. The R4F20335RNFE#V0's JTAG interface is fully compatible with Renesas E20 emulator and third-party tools supporting H8S/2000-core targets.

Is the R4F20335RNFE#V0 pin-compatible with other H8S/203xxR devices?

Yes, the R4F20335RNFE#V0 shares identical 48-pin LQFP packaging and pin assignments with the R4F20323RNFE#V0 and R4F20315RNFE#V0 within the H8S/203xxR group. This allows direct PCB footprint reuse across variants differing only in flash size, RAM, and peripheral enablement-enabling scalable design families. However, functional differences (e.g., CAN presence in R4F20335RNFE#V0) must be verified in software initialization.

What is the data retention specification for the R4F20335RNFE#V0's on-chip flash memory?

The R4F20335RNFE#V0's 128 KB on-chip flash memory guarantees data retention for 20 years at +85°C and 100 years at +25°C after final programming. Endurance is rated at 100,000 write/erase cycles per sector, validated per JEDEC JESD22-A117. The R4F20335RNFE#V0 also includes 1 KB of data flash with same retention and endurance specs, intended for calibration constants and field-updatable parameters.