Renesas R5S77640N300BG

Overview

R5S77640N300BG from Renesas Electronics is a 32-bit RISC microcontroller based on the SH-4A CPU core, featuring integrated FPU, MMU, 16 KB instruction cache, 16 KB operand cache, and support for real-time OS environments. It operates at 300 MHz, delivers 540 MIPS/1080 MFLOPS, and targets high-performance embedded applications including automotive infotainment and industrial HMI systems.

For engineers reviewing the R5S77640N300BG datasheet, R5S77640N300BG pinout, R5S77640N300BG application, or R5S77640N300BG equivalent, key selection criteria include SH-4A ISA compliance, on-chip memory controller support for SDRAM/DDR, integrated Ethernet (EtherC) and USB host/function interfaces, and hardware debug capability via H-UDI.

Technical Context

The R5S77640N300BG implements the SH-4A superscalar architecture with dual-issue 5-stage pipeline, supporting simultaneous execution of integer and floating-point instructions. It integrates a Memory Management Unit (MMU) compliant with SH-4A translation specifications and supports both TLB-compatible and TLB-extended modes for flexible virtual memory management.

On-chip peripherals include EtherC (10/100 Mbps MAC), USB 2.0 host/function controller, SCIF serial interfaces, I²C bus interface, watchdog timer, and programmable interrupt controller (INTC). The device uses a 32-bit external bus interface configurable for SDRAM, SRAM, or NAND Flash via FLCTL.

Key Specifications

Pinout & Package

The R5S77640N300BG is housed in a 484-pin PBGA (Plastic Ball Grid Array) package with 1.0 mm ball pitch, designed for high-density PCB layouts and thermal dissipation in automotive and industrial applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance embedded processor applications.

Compared with R5S77641N300BG, the R5S77640N300BG omits LCDC/G2D to reduce cost and power in headless or externally driven display systems; versus SH7780R300BV, it lacks dedicated crypto blocks but offers identical real-time compute throughput and broader third-party toolchain support.

Availability

R5S77640N300BG is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMI, and digital signage applications requiring stable component supply across multi-year production cycles.

Supply support for R5S77640N300BG 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise markets.

The SH7764 Group - including R5S77640N300BG - was designed as a high-performance embedded processor platform targeting real-time multimedia and networked control applications with full OS support.

FAQ

What is the maximum operating frequency of the R5S77640N300BG?

The R5S77640N300BG operates at a maximum frequency of 300 MHz, achieved using an internal PLL that multiplies an external 25–50 MHz reference clock. This frequency enables 540 MIPS integer performance and 1080 MFLOPS floating-point throughput, verified under specified voltage (1.5 V core) and temperature (−40°C to +85°C) conditions per Renesas Hardware Manual Rev.3.00.

Does the R5S77640N300BG include an integrated memory management unit (MMU)?

Yes, the R5S77640N300BG includes a full-featured MMU compliant with SH-4A architecture specifications. It supports both TLB-compatible and TLB-extended modes, provides 64-entry unified TLB, and enables page-level memory protection and virtual-to-physical address translation required for Linux and real-time OS deployments.

Which communication interfaces are integrated into the R5S77640N300BG?

The R5S77640N300BG integrates EtherC (10/100 Mbps Ethernet MAC), USB 2.0 host/function controller, four SCIF serial channels, and an I²C bus interface. These peripherals are memory-mapped and support DMA transfers via the on-chip DMAC, enabling high-throughput, low-CPU-overhead connectivity in networked embedded systems.

Is the R5S77640N300BG pin-compatible with other SH7764 family members?

No, the R5S77640N300BG is not pin-compatible with R5S77641N300BG or SH7764 variants due to differences in peripheral inclusion - specifically, R5S77641N300BG adds LCDC and G2D signal balls absent in R5S77640N300BG's 484-pin PBGA layout. PCB layout must be redesigned for any family substitution.

What debug capabilities does the R5S77640N300BG provide?

The R5S77640N300BG implements the H-UDI (User Debugging Interface) compliant with IEEE 1149.1 JTAG, supporting non-intrusive real-time debugging, hardware breakpoints, watchpoints, and full register visibility. It allows live inspection of CPU state, cache tags, MMU page tables, and peripheral registers without halting instruction execution or affecting system timing.