Renesas IDT79RC32V364-100DA

Overview

IDT79RC32V364-100DA from Integrated Device Technology, Inc. is a 32-bit embedded microprocessor based on the RISCore32300 CPU core, implementing the MIPS 32 ISA with DSP extensions. It operates at 100 MHz, delivers 175 Dhrystone MIPS, integrates 8 kB instruction and 2 kB data caches (2-way set associative), supports 3.3 V core/I/O, and targets cost-sensitive communications and consumer systems.

For engineers reviewing the IDT79RC32V364-100DA datasheet, IDT79RC32V364-100DA pinout, IDT79RC32V364-100DA application, or IDT79RC32V364-100DA equivalent, key selection considerations include its RC4000-compatible MMU with 16-entry TLB mapping up to 512 MB, 66 million MAC/sec DSP capability, enhanced JTAG debug interface with Real-Time Trace mode, and industrial temperature range support.

Technical Context

The IDT79RC32V364-100DA implements a scalar 5-stage pipeline optimized for deterministic real-time interrupt response and low-latency branch handling. Its RISCore32300 core executes MIPS 32 instructions with architectural enhancements including MAD/MSUB, CLZ/CLO, and MUL bypassing HI/LO registers - enabling efficient integer DSP workloads without software overhead.

Virtual memory management uses a fully associative 16-entry TLB supporting variable page sizes (4 kB–16 MB) and per-page cache coherency attributes (uncached, write-back, write-through). The system interface provides programmable 8-/16-/32-bit port widths, burst transfers, and DMA arbitration via BusReq*/BusGnt*, all synchronized to a multiplexed AD[31:0] bus with ALE and ADS* control.

Key Specifications

Pinout & Package

Package: 144-pin TQFP (12 mm × 12 mm, 0.5 mm pitch), lead-free compatible, industrial temperature grade.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT79RC32V364-100DA, the -133DA variant offers higher deterministic throughput for algorithmic workloads but demands stricter thermal management, while the MPC823EVRM requires full software re-architecture and lacks native MAC acceleration - making IDT79RC32V364-100DA optimal for new MIPS-based xDSL and STB designs requiring balanced performance, power, and debug visibility.

Availability

IDT79RC32V364-100DA is available at Aetrix Electronics and suitable for DSL modem baseband processing, xDSL line card control, and set-top box media controller applications requiring stable component supply across extended product lifecycles.

Supply support for IDT79RC32V364-100DA 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, Inc. (IDT) was a fabless semiconductor company specializing in high-performance timing, memory interface, and embedded processor solutions before its acquisition by Renesas Electronics in 2019.

The IDT79RC32V364-100DA belongs to the RISController™ family - designed specifically for cost-sensitive, real-time embedded systems in broadband access and consumer electronics where MIPS software compatibility, on-chip DSP acceleration, and industrial-grade reliability are essential.

FAQ

What is the maximum operating frequency of the IDT79RC32V364-100DA?

The IDT79RC32V364-100DA is rated for operation at 100 MHz. This frequency is specified under industrial temperature conditions (−40°C to +85°C) and 3.3 V ±5% supply. The device achieves 175 Dhrystone MIPS at this speed, with internal pipeline stages and cache subsystems fully characterized to sustain this clock rate without timing violations. IDT79RC32V364-100DA does not support overclocking beyond its rated specification.

Does the IDT79RC32V364-100DA support JTAG-based real-time tracing?

Yes, the IDT79RC32V364-100DA implements an Enhanced JTAG interface with Real-Time Mode that outputs non-sequential program counter values via the TDO/TPC pin. This allows cycle-accurate instruction flow monitoring at full CPU clock speed without halting execution. The PCST[2:0] status pins provide additional context for trace decoding. IDT79RC32V364-100DA requires no external trace buffer hardware, making it suitable for field-debugging time-critical embedded applications.

What cache coherency models does the IDT79RC32V364-100DA support?

The IDT79RC32V364-100DA supports three per-page cache coherency models controlled by TLB attribute bits: uncached (bypasses cache entirely), non-coherent write-back (cache lines written back to memory on eviction), and non-coherent write-through no write-allocate (writes propagate immediately to memory, no cache allocation on write miss). These modes are configured independently for each 4 kB–16 MB virtual page mapped in the TLB. IDT79RC32V364-100DA does not implement hardware cache coherency protocols like MESI.

Can the IDT79RC32V364-100DA interface directly with SDRAM?

No, the IDT79RC32V364-100DA does not include an integrated SDRAM controller. Its system interface is a generic 32-bit multiplexed address/data bus with programmable timing (ALE, ADS*, RD*, WR*, BE*, CIP*) designed to connect to external memory controllers such as the IDT RC32134 or discrete logic. SDRAM interfacing requires an external controller that manages row/column addressing, refresh, and burst timing. IDT79RC32V364-100DA relies on its large on-chip caches and early-restart capability to mask SDRAM latency.

Is the IDT79RC32V364-100DA pin-compatible with other RC32364 variants?

Yes, the IDT79RC32V364-100DA is pin-compatible with other speed grades in the RC32364 family (e.g., IDT79RC32V364-133DA) and shares identical 144-pin TQFP packaging, pinout, and electrical signaling. All RC32364 variants use the same AD[31:0], BE*[3:0], I/D*, and interrupt pin assignments. However, timing parameters (e.g., setup/hold times, clock-to-output delays) differ per speed grade and must be validated against the respective datasheet revision for IDT79RC32V364-100DA.