Renesas DF7055SF40KNV

Overview

DF7055SF40KNV from Renesas Electronics is a 32-bit RISC microcontroller based on the SH-2E core, featuring an integrated floating-point unit (FPU), 512 KB flash memory, 32 KB RAM, and Controller Area Network (HCAN) interface. It supports flexible zero-turnaround-time (F-ZTAT™) firmware updates and targets high-level industrial control systems requiring real-time deterministic response.

For engineers reviewing the DF7055SF40KNV datasheet, DF7055SF40KNV pinout, DF7055SF40KNV application, or DF7055SF40KNV equivalent, key selection criteria include its 40 MHz maximum CPU frequency, HCAN compliance per ISO 11898-1, 12-bit A/D converter with 12 channels, DMAC with 4-channel support, and F-ZTAT™ flash architecture enabling rapid field firmware iteration in embedded motion control and automotive subsystems.

Technical Context

The DF7055SF40KNV implements the SH-2E superscalar RISC architecture with dual-issue capability and a 5-stage pipeline. It integrates a dedicated HCAN controller supporting bit rates up to 1 Mbps, programmable prescalers for timer channels 0–11, and an ATU-II (Advanced Timer Unit) with PWM, input capture, and twin-capture functions across 12 independent channels.

Its flash memory subsystem uses F-ZTAT™ technology with 128-byte simultaneous programming (t_P = 1.2 ms typ), block erase time of 100 ms (typ), and endurance rated for ≥10,000 write/erase cycles. The device operates from a single 3.3 V supply and includes on-chip PLL with selectable multiplication factors (×1 to ×8) for clock generation.

Key Specifications

Pinout & Package

DF7055SF40KNV is housed in a 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow Renesas' SH7055S F-ZTAT™ standard layout, including dedicated HCAN_TX/RX pins (P15_0/P15_1), 12 A/D input pins (AN0–AN11), and 48 general-purpose I/O lines grouped into 6 ports (P0–P5).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF7055SF40KNV, R5F70D582DxFP trades HCAN integration for USB flexibility and reduced flash, while MB9BF518RPMC offers higher clock speed and ARM ecosystem support but sacrifices deterministic FPU performance and zero-turnaround flash update capability essential for industrial firmware agility.

Availability

DF7055SF40KNV is available at Aetrix Electronics and suitable for industrial motion control, automotive body electronics, and smart energy metering applications requiring stable component supply and long-term lifecycle assurance.

Supply support for DF7055SF40KNV 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 industrial, automotive, and infrastructure markets.

The SH7055S F-ZTAT™ product line was designed specifically for deterministic real-time control applications demanding rapid firmware iteration, integrated communication (HCAN), and hardware-accelerated math - targeting factory automation, vehicle subsystems, and intelligent power equipment.

FAQ

What is the maximum operating frequency of the DF7055SF40KNV?

The DF7055SF40KNV operates at a maximum CPU frequency of 40 MHz. This rating is guaranteed across the full industrial temperature range (−40°C to +85°C) when powered from a stable 3.3 V supply and using the on-chip PLL with appropriate external crystal (e.g., 10 MHz ×4 multiplication). The DF7055SF40KNV achieves this speed with zero wait-state access to on-chip flash memory due to its F-ZTAT™ architecture and prefetch buffer.

Does the DF7055SF40KNV include a hardware CAN controller?

Yes, the DF7055SF40KNV integrates a dedicated HCAN controller compliant with ISO 11898-1, supporting bit rates up to 1 Mbps. It features 32 message objects, programmable acceptance filters, automatic retransmission, and built-in error counters. Unlike software-implemented CAN stacks, the HCAN controller in DF7055SF40KNV handles protocol framing, arbitration, and ACK generation in hardware, freeing the SH-2E core for application tasks.

What flash programming method does the DF7055SF40KNV support?

The DF7055SF40KNV supports in-system programming via its F-ZTAT™ flash interface, enabling 128-byte simultaneous writes with typical programming time of 1.2 ms and block erase time of 100 ms. Programming is performed through the on-chip ROM-resident bootloader or user code using the dedicated flash control registers. DF7055SF40KNV does not require external high-voltage programming signals - all operations use standard 3.3 V supply.

Can the DF7055SF40KNV perform analog-to-digital conversion on multiple channels simultaneously?

No, the DF7055SF40KNV's 12-bit A/D converter performs sequential sampling across its 12 input channels (AN0–AN11) in hardware scan mode, completing a full 12-channel sequence in 14.4 µs at maximum conversion rate. While it cannot sample all channels truly simultaneously, the ATU-II timer can trigger conversions with precise inter-channel timing (down to 100 ns resolution), enabling pseudo-simultaneous acquisition for motor phase current measurement.

What development tools are officially supported for the DF7055SF40KNV?

Renesas provides official toolchain support for DF7055SF40KNV via the High-Performance Embedded Workshop IDE, SH C/C++ Compiler (v9.0+), and SH Simulator/Debugger. Hardware debugging is enabled through the on-chip JTAG interface compatible with Renesas E8/E20 emulators. Reference designs and BSPs are available in the SH7055S F-ZTAT™ Hardware Manual (Rev. 2.00) and associated application notes.