Renesas R5S77632AY266BGV

Overview

R5S77632AY266BGV from Renesas Electronics is a 32-bit RISC microcomputer based on the SH-4A CPU core, featuring integrated FPU, MMU, dual 16-KB instruction and operand caches, DDR-SDRAM interface, and SuperHyway bus master capability. It operates at 266 MHz with 1.8 V core voltage and supports real-time OS environments in industrial control and multimedia processing systems.

For engineers reviewing the R5S77632AY266BGV datasheet, R5S77632AY266BGV pinout, R5S77632AY266BGV application, or R5S77632AY266BGV equivalent, key selection criteria include its 266 MHz SH-4A execution speed, 1.8 V core supply, DDRIF timing compliance, 388-pin BGA package, and support for 32-bit address extended mode with PMB-based memory mapping.

Technical Context

The R5S77632AY266BGV implements the SH-4A superscalar architecture with dual-issue 5-stage pipelines, supporting simultaneous integer and floating-point operations. It integrates a Memory Management Unit (MMU) with unified TLB, 32-bit address extended mode via Privileged Space Mapping Buffer (PMB), and hardware-managed cache coherency between IC/OC and external memory.

Its on-chip peripherals include DDR-SDRAM Interface (DDRIF) compliant with JEDEC standards, Serial Sound Interface (SSI), Multimedia Card Interface (MMCIF), and multiple serial communication channels (SCIF, SIOF). The chip supports JTAG-based debugging via H-UDI and includes watchdog timer (WDT), real-time clock (RTC), and interrupt controller (INTC) with 128 vector entries.

Key Specifications

Pinout & Package

Package: 388-pin Plastic Ball Grid Array (PBGA), 19 mm × 19 mm, 0.8 mm ball pitch, standard JEDEC MO-251AC footprint. Thermal pad exposed on underside for heatsink attachment or PCB copper pour.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5S77632AY266BGV, R5S77631AY266BGV removes DDRIF to reduce cost and complexity for SRAM-centric designs, while R5S77632AY333BGV trades higher power and thermal demand for +25% CPU throughput-both require distinct PCB layout and power delivery validation.

Availability

R5S77632AY266BGV is available at Aetrix Electronics and suitable for industrial motion control, automotive infotainment, digital broadcast, and medical imaging applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5S77632AY266BGV 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 devices, and power management ICs for industrial, automotive, and consumer markets.

The SH-4A Series, including R5S77632AY266BGV, was designed for high-performance embedded applications demanding real-time processing, memory-intensive multimedia workloads, and deterministic OS execution in resource-constrained environments.

FAQ

What is the maximum operating frequency of the R5S77632AY266BGV?

The R5S77632AY266BGV is rated for a maximum CPU clock frequency of 266 MHz, derived from an internal PLL locked to a 26.6 MHz external reference clock. This frequency is guaranteed under specified 1.8 V core supply and ambient temperature conditions per Renesas Hardware Manual Rev.3.00. Operation beyond this limit may cause timing violations or functional failure.

Does the R5S77632AY266BGV include a memory management unit (MMU)?

Yes, the R5S77632AY266BGV integrates a full-featured MMU supporting 32-bit virtual-to-physical address translation, unified TLB with 64 entries, and software-managed page tables. This enables robust multitasking OS support-including Linux and VxWorks-with memory protection, process isolation, and demand-paged virtual memory, as documented in Section 6 of the SH7763 Hardware Manual.

What type of DDR memory does the R5S77632AY266BGV support?

The R5S77632AY266BGV supports DDR2-400 SDRAM via its dedicated DDR-SDRAM Interface (DDRIF), compliant with JEDEC Standard No. 208F. It supports 256 MB to 1 GB modules with programmable CAS latency, burst lengths of 4 or 8, and auto-refresh control-all configurable through dedicated DDRIF registers in the R5S77632AY266BGV memory map.

Is the R5S77632AY266BGV pin-compatible with other SH-4A family members?

No, the R5S77632AY266BGV is not pin-compatible with other SH-4A variants such as R5S77631AY266BGV due to differences in peripheral integration-specifically, the absence of DDRIF signals in the latter. Pin assignments for DDR-related balls (e.g., DDQS, DQ, DM) are unused or repurposed in non-DDR variants, requiring distinct PCB layouts for each part number.

What debug interface does the R5S77632AY266BGV provide?

The R5S77632AY266BGV features the H-UDI (User Debugging Interface) compliant with IEEE 1149.1 JTAG, supporting boundary-scan testing, real-time instruction trace, and non-intrusive breakpoint insertion. Its dedicated TAP controller and trace buffer allow full visibility into CPU execution flow without halting system operation-critical for validating real-time firmware on R5S77632AY266BGV-based platforms.