Renesas DE70855RN80FPV

Overview

DE70855RN80FPV from Renesas Electronics is a 32-bit RISC microcontroller in the SH7085 group, featuring the SuperH™ CPU core, 512 KB on-chip Flash memory, 32 KB RAM, and integrated peripherals including UART, CAN, I²C, and 12-bit ADC. It operates at up to 40 MHz and targets industrial control and embedded automation systems requiring deterministic real-time response.

For engineers reviewing the DE70855RN80FPV datasheet, DE70855RN80FPV pinout, DE70855RN80FPV application, or DE70855RN80FPV equivalent, key selection criteria include its 80-pin LQFP package, CAN 2.0B interface support, 5 V tolerant I/O, 1.8–5.5 V operating voltage range, and compliance with industrial temperature grade (−40°C to +85°C).

Technical Context

The DE70855RN80FPV implements the SuperH RISC engine SH-2A core with 32-bit data path, 32 × 32-bit general-purpose registers, and hardware multiply/divide unit. It integrates a Clock Pulse Generator (CPG) supporting crystal/resonator and external clock inputs, plus programmable PLL for flexible system clock derivation up to 40 MHz.

On-chip peripheral modules include a 16-channel 12-bit ADC with sample-and-hold, dual CAN controllers compliant with ISO 11898-1, three asynchronous serial interfaces (SCI) with LIN support, and an 8-channel DMAC with scatter-gather capability - all accessible via dedicated interrupt vectors and configurable priority levels.

Key Specifications

Pinout & Package

DE70855RN80FPV is housed in an 80-pin LQFP package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per SH7085 Group Hardware Manual Rev.6.00, Section 1.3 (Pin Assignments) and Section 1.4 (Pin Functions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F70855RNNFP and R5F70845RNNFP, DE70855RN80FPV offers superior thermal performance via its exposed-pad LQFP and maximum memory headroom for complex control algorithms and field-upgradable features - critical for long-lifecycle industrial deployments.

Availability

DE70855RN80FPV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, and commercial HVAC controllers requiring stable component supply and long-term manufacturing continuity.

Supply support for DE70855RN80FPV 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 SH7085 Group - including DE70855RN80FPV - was designed for deterministic real-time control in harsh industrial environments, emphasizing peripheral integration, flash reliability, and extended temperature operation.

FAQ

What is the maximum operating frequency of the DE70855RN80FPV?

The DE70855RN80FPV operates at a maximum CPU frequency of 40 MHz, achieved via its on-chip Clock Pulse Generator (CPG) with programmable PLL. This frequency is sustained across the full industrial temperature range (−40°C to +85°C) when powered within the specified 1.8–5.5 V supply range. The DE70855RN80FPV's SH-2A core delivers consistent 40 MIPS performance without throttling under thermal stress.

Does the DE70855RN80FPV support CAN FD or only classical CAN?

The DE70855RN80FPV integrates two CAN 2.0B controllers compliant with ISO 11898-1, supporting classical CAN up to 1 Mbps - not CAN FD. Its CAN modules lack the variable bit rate, extended data length, and CRC enhancements required for CAN FD. For CAN FD applications, engineers should consider Renesas' RA6T2 or RH850/F1K families instead of the DE70855RN80FPV.

What debug interface does the DE70855RN80FPV provide?

The DE70855RN80FPV includes a User Break Controller (UBC) with two independent hardware breakpoints for address and data access, supporting non-intrusive code debugging and real-time trace. It does not feature SWD or JTAG; instead, it relies on Renesas' E10A-USB or E20 debug emulators via the dedicated UBC pins (UBA0–UBA1, UBD0–UBD1). This debug architecture is documented in Section 7 of the SH7080 Group Hardware Manual.

Is the DE70855RN80FPV pin-compatible with other SH7085 variants?

Yes, the DE70855RN80FPV shares identical pin assignment and electrical characteristics with other SH7085 family members in the 80-pin LQFP package (e.g., R5F70855RNFP, R5M70855RNFP), including matching I/O voltage tolerances, reset behavior, and peripheral pin muxing. This allows direct substitution within the same PCB layout when memory or feature requirements align.

What is the Flash endurance and data retention specification for the DE70855RN80FPV?

The DE70855RN80FPV specifies 10,000 write/erase cycles for its 512 KB on-chip Flash memory, with data retention guaranteed for 20 years at +85°C and 100 years at +25°C. These values are validated per JEDEC JESD22-A117 and apply to standard erase-block programming sequences - not sector-by-sector partial writes. Firmware update routines for the DE70855RN80FPV must observe these limits to ensure field reliability.