Renesas HD6417604SF28

Overview

HD6417604SF28 from Renesas Electronics (formerly Hitachi) is a 32-bit SuperH™ RISC microcontroller in the SH-2 family, featuring a 20 MHz maximum clock frequency, 4 KB on-chip unified cache, 32/16/8-bit external bus interface, and integrated peripherals including dual serial communication interfaces (SCI), two-channel DMA controller, watchdog timer, and programmable timers. It targets cost-sensitive embedded control applications requiring deterministic real-time response and low-power operation.

For engineers reviewing the HD6417604SF28 datasheet, HD6417604SF28 pinout, HD6417604SF28 application, or HD6417604SF28 equivalent, key selection criteria include its SH-2 ISA compatibility, 0.8 µm CMOS process, 20 MIPs @ 5 V performance, TQFP-144 package footprint, and support for static RAM, DRAM, and burst-mode ROM interfacing without external glue logic.

Technical Context

The HD6417604SF28 implements the SH-2 architecture with 62 instruction types, including 32×32→64-bit MAC and 64/32-bit integer division units. Its five-stage pipeline executes most instructions in one cycle, with delay-slot handling for branches and calls to minimize stalls.

It supports big-endian memory layout across its full 4 GB address space and includes hardware-based power management with standby and sleep modes. The on-chip Bus State Controller (BSC) manages timing for asynchronous and synchronous external memory access, supporting wait-state insertion and refresh control for DRAM.

Key Specifications

Pinout & Package

HD6417604SF28 is housed in a 144-pin plastic thin quad flat package (TQFP) with 0.5 mm pitch, designed for surface-mount assembly and thermal dissipation in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD6417605SF28 and SH7616, the HD6417604SF28 delivers verified 20 MHz operation in industrial temperature range with minimal BOM count, making it the preferred choice for volume production of established printer, HMI, and bridge designs where pin compatibility and toolchain continuity are mandatory.

Availability

HD6417604SF28 is available at Aetrix Electronics and suitable for printer engine control, industrial HMI terminals, embedded network bridges, and automotive diagnostic tools requiring stable component supply and long-term lifecycle support.

Supply support for HD6417604SF28 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 formed from the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial, automotive, and infrastructure markets.

The HD6417604SF28 belongs to the SuperH™ SH-2 product line, engineered for cost-effective, real-time embedded control in consumer and industrial equipment where deterministic timing, low external component count, and mature toolchain support are essential.

FAQ

What is the maximum operating frequency of the HD6417604SF28?

The HD6417604SF28 is rated for a maximum clock frequency of 20 MHz at 5.0 V supply voltage. This specification is guaranteed across the full industrial temperature range (−40°C to +85°C) and defines the upper limit for reliable instruction execution and peripheral timing. Operating the HD6417604SF28 above this frequency may result in undefined behavior or data corruption. The device also supports lower-frequency operation down to DC for ultra-low-power applications.

Does the HD6417604SF28 include an on-chip memory management unit (MMU)?

No, the HD6417604SF28 does not include a memory management unit. It belongs to the SH-2 family, which lacks virtual memory support and TLB functionality. MMU capability was introduced in the later SH-3 family (e.g., SH7702). The HD6417604SF28 uses a flat 4 GB logical address space with direct physical addressing, making it suitable for real-time OS environments like µITRON that do not require hardware-based memory protection or paging.

Which development tools are officially supported for the HD6417604SF28?

Renesas provides official support for the HD6417604SF28 through its High-performance Embedded Workshop (HEW) IDE, the C/C++ compiler for SuperH (SHC), and the E8/E8a in-circuit emulators. Third-party tools including IAR Embedded Workbench for SuperH and Green Hills MULTI also fully support the HD6417604SF28. All toolchains target the SH-2 instruction set and recognize the device's memory map, peripheral register layout, and debug interface specifications.

Can the HD6417604SF28 interface directly with SDRAM?

No, the HD6417604SF28 cannot interface directly with SDRAM. Its Bus State Controller supports static RAM, EPROM, and asynchronous DRAM with refresh control, but lacks the SDRAM command sequencing, burst-length configuration, and auto-refresh timing required for synchronous DRAM operation. SDRAM support was added in the SH-3 family (e.g., SH7708). For HD6417604SF28-based designs requiring higher memory bandwidth, pseudo-static RAM or fast SRAM are the compatible alternatives.

What is the function of the GBR (Global Base Register) in the HD6417604SF28?

The Global Base Register (GBR) in the HD6417604SF28 holds a base address used for indirect GBR addressing modes, enabling compact and efficient access to on-chip peripheral registers and shared data structures. When combined with a displacement or index register, the GBR allows the HD6417604SF28 to reference fixed memory-mapped I/O regions-such as SCI control registers or timer counters-without consuming general-purpose registers or requiring absolute addresses in code, improving both code density and maintainability.