Renesas DF70855AD80FPV

Overview

DF70855AD80FPV from Renesas Electronics is a 32-bit RISC microcontroller in the SH7085 subgroup of the SH7080 family, featuring the SuperH™ CPU core, 512 KB on-chip Flash memory, 32 KB RAM, and integrated peripherals including CPG, INTC, UBC, and multiple serial interfaces. It operates at up to 40 MHz and targets industrial control and embedded instrumentation applications requiring deterministic real-time response.

For engineers reviewing the DF70855AD80FPV datasheet, DF70855AD80FPV pinout, DF70855AD80FPV application, or DF70855AD80FPV equivalent, key selection criteria include its 128-pin LQFP package, 3.3 V single-supply operation, Flash endurance (10,000 write/erase cycles), on-chip debug support via JTAG, and compliance with industrial temperature range (−40°C to +85°C).

Technical Context

The DF70855AD80FPV implements the SH-2 CPU architecture with 32-bit data path, 32 general-purpose registers, and a 16-bit instruction set for high code density. It integrates a Clock Pulse Generator supporting crystal/resonator and external clock inputs, programmable frequency division, and oscillator stop detection.

Its interrupt system includes a 16-level priority Interrupt Controller (INTC) with 64 vector sources, and a User Break Controller (UBC) supporting hardware breakpoints on address and data access-enabling precise debugging without code instrumentation. All peripherals are memory-mapped and accessible via unified 32-bit addressing.

Key Specifications

Pinout & Package

DF70855AD80FPV is housed in a 128-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per the SH7085 Group Hardware Manual Rev. 6.00, Section 1.3 (Pin Assignments) and Section 1.4 (Pin Functions). Key signal groups include VCC/VSS pairs distributed across corners and edges for noise suppression, dedicated reset (RES#), clock input (EXTAL/XTAL), and multiplexed I/O ports (PORTA–PORTL).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF70855AD80FPV, R5F70855ADFPV offers identical functionality at lower qualification cost but excludes industrial temperature validation, while SH7085D50FPV delivers higher clock speed and reduced memory at the expense of firmware portability and peripheral configuration compatibility.

Availability

DF70855AD80FPV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, building automation controllers, and test & measurement front-ends requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for DF70855AD80FPV 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 enterprise applications.

The SH7080 Group-including DF70855AD80FPV-is designed for deterministic real-time embedded control in resource-constrained industrial equipment, emphasizing low-latency interrupt response, on-chip debug capability, and long-lifecycle support.

FAQ

What is the maximum operating frequency of the DF70855AD80FPV?

The DF70855AD80FPV operates at a maximum CPU frequency of 40 MHz, derived from its integrated Clock Pulse Generator (CPG) with programmable prescalers. This frequency is guaranteed across the full industrial temperature range (−40°C to +85°C) and 3.3 V ±0.3 V supply, enabling consistent real-time performance in demanding control applications without thermal throttling.

Does the DF70855AD80FPV support in-system programming of its on-chip Flash memory?

Yes, the DF70855AD80FPV supports in-system programming (ISP) of its 512 KB Flash memory via the on-chip Flash memory controller and JTAG interface. Firmware updates can be performed without removing the DF70855AD80FPV from the target board, using standard debug tools compliant with IEEE 1149.1 and Renesas' Flash development toolkit.

What debug interfaces are available on the DF70855AD80FPV?

The DF70855AD80FPV provides a full IEEE 1149.1-compliant JTAG interface (TRST#, TCK, TMS, TDI, TDO) for boundary-scan testing, flash programming, and real-time debugging. It also integrates a User Break Controller (UBC) supporting hardware address/data breakpoints-enabling non-intrusive inspection of memory-mapped peripheral access during DF70855AD80FPV firmware execution.

Is the DF70855AD80FPV qualified for automotive applications?

No, the DF70855AD80FPV is classified as a "Standard" quality grade device per Renesas documentation and is intended for industrial, office, and consumer applications-not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature screening beyond +85°C, and automotive-specific failure mode analysis required for vehicle deployment.

How many interrupt sources does the DF70855AD80FPV support, and how are priorities managed?

The DF70855AD80FPV supports 64 interrupt sources managed by its Interrupt Controller (INTC), with 16 programmable priority levels assigned via IPRA–IPRM registers. Each source maps to a unique vector in the exception table, and nested interrupts are enabled by default-allowing higher-priority events (e.g., timer overflow) to preempt lower-priority ones (e.g., UART receive) without software intervention in DF70855AD80FPV firmware.