Renesas IDT79RV4650-200DP

Overview

IDT79RV4650-200DP from Integrated Device Technology is a 3.3V, 200MHz, 64-bit RISC microprocessor implementing the MIPS-III ISA with integer DSP extensions, 8KB instruction and 8KB data caches, and a 5-stage pipeline - deployed in embedded internetworking and multimedia systems requiring deterministic real-time response.

For engineers reviewing the IDT79RV4650-200DP datasheet, IDT79RV4650-200DP pinout, IDT79RV4650-200DP application, or IDT79RV4650-200DP equivalent, key selection factors include its 200MHz pipeline clock (PLL-multiplied from 100MHz system clock), cache locking support for time-critical code, integer multiply-accumulate throughput of 133.5M ops/sec at full speed, and socket compatibility with RC64475/RC64575 for migration paths.

Technical Context

The IDT79RV4650-200DP implements a 5-stage integer pipeline with separate 64-bit ALU and autonomous multiply/divide unit, supporting MUL and MAD instructions for accelerated integer DSP workloads. Its CP0 co-processor includes base-bounds registers for TLB-less virtual-to-physical address translation in user mode.

It integrates a single-precision IEEE 754 floating-point unit with 32×32-bit register file, 8-cycle MUL latency, and trap-based double-precision emulation - paired with two-way set-associative, parity-protected 8KB instruction and 8KB data caches featuring per-set lockability and write-back/write-through policy control via CAlg register.

Key Specifications

Pinout & Package

Package: 352-pin Ceramic Pin Grid Array (CPGA), 52.32 mm × 52.32 mm, 1.27 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT79RC4650-200DP and IDT79RC64475-200DP, the IDT79RV4650-200DP delivers identical 200 MHz integer performance and cache architecture at lower voltage (3.3V), reducing system power by ~35% while retaining socket compatibility - making it optimal for thermally constrained embedded designs where double-precision FP is unnecessary.

Availability

IDT79RV4650-200DP is available at Aetrix Electronics and suitable for network packet processing, embedded multimedia decoding, industrial protocol gateway, print engine control, and real-time control applications requiring stable component supply across extended product lifecycles.

Supply support for IDT79RV4650-200DP 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

Integrated Device Technology (IDT) is a fabless semiconductor company specializing in high-performance timing, memory interface, RF, and embedded processor solutions for communications and industrial markets.

The IDT79RV4650-200DP belongs to IDT's RISController family of 64-bit embedded microprocessors, designed specifically for cost-sensitive, real-time embedded systems needing MIPS-III compatibility, integrated caches, and integer DSP acceleration without double-precision FP overhead.

FAQ

What is the core voltage requirement for the IDT79RV4650-200DP?

The IDT79RV4650-200DP operates at a nominal core supply voltage of 3.3 V ±0.3 V, consistent with its "RV" designation indicating 3.3V operation. This lower voltage reduces active power consumption by approximately 35% compared to the 5V "RC" variant while maintaining full 200 MHz pipeline performance. The device includes on-chip voltage regulation support and requires clean, low-noise 3.3V distribution with decoupling per IDT's hardware design guidelines.

Does the IDT79RV4650-200DP support double-precision floating-point arithmetic?

No, the IDT79RV4650-200DP implements only single-precision IEEE 754 floating-point operations. Double-precision instructions (e.g., DDIV, LDC1) trigger a trap exception, requiring software emulation. This architectural choice reduces die area and power versus the IDT79RC64475-200DP, which includes full double-precision hardware. Applications needing DP FP must use emulation libraries or select the RC64475 variant.

How does cache locking function on the IDT79RV4650-200DP?

The IDT79RV4650-200DP supports locking of Set A in both instruction and data caches via dedicated CP0 configuration bits. When enabled, locked lines in Set A cannot be overwritten by cache misses, preserving time-critical code or data. This ensures deterministic access latency for real-time tasks - for example, interrupt service routines remain resident with 100% cache hit rate, guaranteeing worst-case response within 2 µs.

Is the IDT79RV4650-200DP pin-compatible with other IDT microprocessors?

Yes, the IDT79RV4650-200DP is socket-compatible with the IDT79RC64475-200DP and IDT79RC64575-200DP, sharing identical 352-pin CPGA mechanical footprint and signal mapping. This enables direct hardware migration paths: upgrading to double-precision FP or TLB support requires only a drop-in replacement and minor BIOS/firmware updates, with no PCB redesign needed.

What memory management model does the IDT79RV4650-200DP use instead of a TLB?

The IDT79RV4650-200DP replaces the traditional TLB with base-bounds register pairs (IBase/IBound for instruction space, DBase/DBound for data space) in CP0. On each virtual address access, the processor compares the address against the bound and adds the base if valid - enabling TLB-less multitasking with hardware-enforced memory protection. This reduces silicon area and power while supporting position-independent code and real-time OS partitioning.