Renesas R5F72146HDFA#V1

Overview

R5F72146HDFA#V1 from Renesas Electronics is a 32-bit RISC microcontroller based on the SuperH™ SH-2A CPU core, featuring 512 KB on-chip Flash memory, 64 KB RAM, and integrated peripherals including SCI, I²C, CAN, USB 2.0 FS, and 12-bit ADC. It operates at up to 100 MHz and targets automotive body control modules and industrial motor control systems requiring real-time deterministic response.

For engineers reviewing the R5F72146HDFA#V1 datasheet, R5F72146HDFA#V1 pinout, R5F72146HDFA#V1 application, or R5F72146HDFA#V1 equivalent, key selection criteria include its CAN 2.0B interface compliance, 100 MHz max clock frequency, 512 KB Flash with ECC protection, and -40°C to +125°C operating temperature range for under-hood automotive use.

Technical Context

The R5F72146HDFA#V1 implements the SH-2A core with FPU support, enabling single-precision floating-point operations for motor control algorithms. It integrates a Clock Pulse Generator (CPG) supporting multiple clock sources - crystal resonator (1–20 MHz), external clock input, and internal oscillator - with programmable PLL for generating system clocks up to 100 MHz.

Peripheral integration includes a Data Transfer Controller (DTC) for autonomous DMA transfers, an Interrupt Controller (INTC) with 128 interrupt sources and 7 priority levels, and a Bus State Controller (BSC) supporting external memory expansion up to 64 MB with configurable wait states and burst access modes.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.

Compared with R5F72146HDFA#V1, the R5F72147HDFA#V1 offers expanded data retention capability for calibration data, while the R5F72145HDFA#V1 provides a memory-downgraded option for simpler control tasks - both maintain identical peripheral sets and thermal qualification for drop-in evaluation.

Availability

R5F72146HDFA#V1 is available at Aetrix Electronics and suitable for automotive body control units, industrial motor drives, and diagnostic tool development requiring stable component supply across long product lifecycles.

Supply support for R5F72146HDFA#V1 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 global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The SH7214 Group - including the R5F72146HDFA#V1 - was designed specifically for automotive body electronics and industrial real-time control, emphasizing functional safety, high-temperature reliability, and integrated communication interfaces.

FAQ

What is the maximum operating frequency of the R5F72146HDFA#V1?

The R5F72146HDFA#V1 operates at a maximum system clock frequency of 100 MHz, achieved via its integrated Clock Pulse Generator (CPG) with PLL circuitry. This frequency is sustained across the full -40°C to +125°C operating temperature range and supports real-time deterministic execution of motor control and communication stacks. The R5F72146HDFA#V1 achieves this using an external crystal (1–20 MHz) or clock source, multiplied internally without requiring external frequency synthesizers.

Does the R5F72146HDFA#V1 support CAN FD?

No, the R5F72146HDFA#V1 supports CAN 2.0B only, compliant with ISO 11898-1, with data rates up to 1 Mbps. It does not implement CAN FD protocol features such as flexible data-rate switching or extended payload length. For CAN FD applications, Renesas offers later-generation RH850 or RA6T2 devices. The R5F72146HDFA#V1's dual CAN controllers remain fully suitable for legacy automotive networks and industrial fieldbus implementations requiring standard CAN messaging.

Is the R5F72146HDFA#V1 qualified for automotive applications?

Yes, the R5F72146HDFA#V1 is AEC-Q100 qualified and rated for operation from -40°C to +125°C, meeting requirements for under-hood and body-control automotive applications. Its ECC-protected Flash, built-in self-test capabilities, and failure-in-time (FIT) rate documentation support ASIL-B compliance when implemented per ISO 26262 guidelines. The R5F72146HDFA#V1 is explicitly intended for "Standard" and "High Quality" grade applications per Renesas' quality classification, including transportation equipment and safety-critical non-life-support systems.

What debug interface does the R5F72146HDFA#V1 support?

The R5F72146HDFA#V1 supports on-chip debugging via the JTAG interface (IEEE 1149.1), compatible with Renesas E20 emulator and third-party debuggers supporting SH-2A cores. It includes full breakpoint, watchpoint, and real-time trace capabilities through the on-chip debug module. The R5F72146HDFA#V1 does not support SWD or cJTAG; JTAG is the sole standardized debug transport, with dedicated TCK, TMS, TDI, TDO, and TRST pins assigned in the 144-LQFP package.

Can the R5F72146HDFA#V1 operate from a single 3.3 V supply?

Yes, the R5F72146HDFA#V1 is designed for single-supply operation at 3.3 V ±10%, with all I/Os 5 V tolerant. Internal regulators generate core voltage (1.2 V) and analog reference (3.3 V) from the main supply, eliminating need for external DC/DC converters or LDOs. This simplifies power design in space-constrained automotive modules and ensures compatibility with common 3.3 V system rails. The R5F72146HDFA#V1 maintains full functionality - including USB, CAN, and ADC - across the specified supply range without performance derating.