Renesas DF61544J40FPV

Overview

DF61544J40FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1544 Group, featuring the H8SX CPU core with upward compatibility to H8/300H and H8S architectures. It integrates on-chip flash memory, DMA controller, multiple timer units (16-bit and 32-bit), UART/SCI, CAN interface, and 10-bit ADC - operating at up to 40 MHz with 3.3 V supply. It targets real-time industrial control systems requiring deterministic interrupt response and peripheral integration.

For engineers reviewing the DF61544J40FPV datasheet, DF61544J40FPV pinout, DF61544J40FPV application, or DF61544J40FPV equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use cases, and validated alternative options for embedded system design and BOM optimization.

Technical Context

The DF61544J40FPV implements a high-performance 32-bit H8SX CPU core with 27-stage pipeline architecture, supporting three operating modes (Normal, Middle, Advanced) and configurable vector base addressing via VBR. It includes dual-bank on-chip flash (512 KB total) with user-programmable security features and background operation during read-while-write.

Peripheral integration includes a 2-channel CAN controller compliant with ISO 11898-1 (CAN 2.0B), 4-channel 16-bit timer pulse units with PWM and input capture, and a 12-channel 10-bit ADC with conversion time of 1.2 μs. Bus interface supports 16-bit external data bus with programmable wait states and DMAC-driven burst transfers.

Key Specifications

Pinout & Package

DF61544J40FPV is housed in a 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per operating mode (Normal/Middle/Advanced), with multiplexed functions including dedicated CAN TX/RX pins, ADC input channels, and external bus interface signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61544NFPV, DF61544J40FPV adds dual-bank flash for safe over-the-air updates; versus RA6M3GFP, it offers lower latency CAN handling and smaller footprint but less processing headroom and no Ethernet.

Availability

DF61544J40FPV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, motor drive feedback controllers, and factory automation gateways requiring stable component supply across long production lifecycles.

Supply support for DF61544J40FPV 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 H8SX/1544 Group, including DF61544J40FPV, was designed for deterministic real-time control in resource-constrained embedded systems where reliability, peripheral integration, and legacy code compatibility are critical.

FAQ

What is the maximum operating frequency of the DF61544J40FPV?

The DF61544J40FPV operates at a maximum frequency of 40 MHz, achieved using an external crystal or oscillator input routed through the on-chip PLL. This frequency is fully supported across the specified industrial temperature range (−40°C to +85°C) and enables sub-microsecond interrupt latency for time-critical control tasks. The DF61544J40FPV's timing specifications in the hardware manual confirm stable operation at 40 MHz under all valid VCC and temperature conditions.

Does the DF61544J40FPV support CAN FD or only classical CAN 2.0B?

The DF61544J40FPV supports only classical CAN 2.0B (ISO 11898-1), not CAN FD. Its two CAN controllers implement full mailbox-based message handling with identifier masking and FIFO buffering, but lack the variable bit rate, extended data length, and CRC enhancements of CAN FD. For CAN FD applications, engineers must select newer Renesas RA or RH850 families. The DF61544J40FPV remains optimal for legacy CAN networks in industrial automation and automotive body systems.

How much on-chip flash memory does the DF61544J40FPV include, and is it dual-bank?

The DF61544J40FPV includes 512 KB of on-chip flash memory configured in dual banks (256 KB each), enabling background programming and secure firmware updates without halting application execution. This architecture allows one bank to run code while the other is reprogrammed - a key differentiator from single-bank variants like R5F61544NFPV. The DF61544J40FPV's flash controller supports erase/write protection, read-out protection, and user boot code configuration.

What ADC resolution and conversion speed does the DF61544J40FPV provide?

The DF61544J40FPV integrates a 10-bit successive-approximation ADC with 12 input channels and a minimum conversion time of 1.2 μs per sample. It supports both single-ended and pseudo-differential modes, programmable sample-and-hold timing, and hardware trigger sources (e.g., timer overflow or external pin). This ADC performance meets requirements for motor current sensing, temperature monitoring, and power supply supervision in industrial control applications using the DF61544J40FPV.

Is the DF61544J40FPV pin-compatible with other members of the H8SX/1544 Group?

Yes, the DF61544J40FPV is pin-compatible with other 144-pin LQFP variants in the H8SX/1544 Group, including R5F61543 and R5F61544NFPV, sharing identical mechanical footprint, power pin layout, and peripheral pin multiplexing. However, differences exist in flash size, security features, and dual-bank capability - so while PCB layout is reusable, firmware and configuration must be validated per part number. The DF61544J40FPV's pinout matches the official H8SX/1544 Group hardware manual revision 3.00.