Renesas IDT79RC32V334-150BBI

Overview

IDT79RC32V334-150BBI from Integrated Device Technology is a 32-bit integrated communications processor based on the RISCore32300 CPU core implementing the Enhanced MIPS-II ISA, operating at up to 150 MHz, featuring 8 kB instruction cache and 2 kB data cache, MMU with 32-page TLB, and targeted for embedded networking and communications systems requiring high integration and real-time I/O control.

For engineers reviewing the IDT79RC32V334-150BBI datasheet, IDT79RC32V334-150BBI pinout, IDT79RC32V334-150BBI application, or IDT79RC32V334-150BBI equivalent, key selection considerations include its 256-ball PBGA package, 32-bit PCI 2.2 interface, dual 16550-compatible UARTs, SDRAM controller supporting up to 512 MB, and integrated DMA with scatter/gather capability.

Technical Context

The IDT79RC32V334-150BBI integrates a scalar 5-stage pipeline CPU core with conditional move, DSP, and count-leading-zeroes instructions, enabling efficient execution of routing and VoIP processing tasks. Its memory subsystem includes programmable cache write policies (write-through no-allocate, write-through allocate, write-back) and per-line cache locking for deterministic latency in real-time applications.

The device implements a unified local bus interface supporting 8-/16-/32-bit peripherals and boot PROM, a dedicated SDRAM controller with automatic refresh and 4-bank support, and a full 32-bit PCI 2.2 bridge with host/satellite mode, serial EEPROM configuration loading, and three-slot arbiter - all operating at up to 66 MHz with 5 V tolerant I/O.

Key Specifications

Pinout & Package

Package: 256-ball Plastic Ball Grid Array (PBGA), 1.0 mm ball pitch, RoHS-compliant "Green" variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated communications processor applications.

Compared with IDT79RC32334-133BBI, the IDT79RC32V334-150BBI delivers 17 MHz higher CPU throughput for compute-intensive tasks like routing lookups or VoIP transcoding, while maintaining identical peripheral integration, memory interface capabilities, and PCB footprint - making it the preferred choice when performance-critical real-time latency must be minimized.

Availability

IDT79RC32V334-150BBI is available at Aetrix Electronics and suitable for network router control planes, industrial protocol gateways, VoIP media gateways, and legacy system adapter cards requiring stable component supply and long-term industrial lifecycle support.

Supply support for IDT79RC32V334-150BBI 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) was a fabless semiconductor company specializing in high-performance timing, memory interface, and communications ICs before its acquisition by Renesas Electronics in 2019.

The IDT79RC32V334-150BBI belongs to the RC32300 family of integrated communications processors designed to deliver MIPS-compatible processing, PCI connectivity, and memory subsystem integration for cost-sensitive embedded networking and industrial control applications.

FAQ

What is the maximum operating frequency of the IDT79RC32V334-150BBI?

The IDT79RC32V32V334-150BBI operates at up to 150 MHz, as confirmed by its part number suffix "-150" and validated in the AC Timing Characteristics section of the official datasheet (Rev. Y). This frequency applies to the RISCore32300 CPU core and defines the upper limit for instruction execution, cache access, and local bus timing - all guaranteed across the commercial temperature range (0°C to +70°C).

Does the IDT79RC32V334-150BBI support both big-endian and little-endian operation?

Yes, the IDT79RC32V334-150BBI supports both big-endian and little-endian operation at the CPU core level, as explicitly stated in the Features section and CPU Execution Core description. This dual-endian capability is implemented in the RISCore32300 core and extends to the local bus interface, SDRAM controller, and PCI bridge - enabling compatibility with diverse software stacks and legacy peripheral addressing schemes.

What type of memory does the SDRAM controller in the IDT79RC32V334-150BBI support?

The IDT79RC32V334-150BBI's integrated SDRAM controller supports discrete SDRAM chips, SODIMMs, and DIMMs with densities from 16 Mb to 512 Mb per device, organized across four independent banks. It implements full command generation (CAS/RAS/WE/CKE), automatic refresh, and programmable address mapping - eliminating external SDRAM controller logic and supporting up to 512 MB total system memory.

Is the IDT79RC32V334-150BBI pin-compatible with other members of the RC32334 family?

Yes, the IDT79RC32V334-150BBI shares identical 256-ball PBGA packaging and pinout with other RC32334 variants including the -133BBI and -100BBI, as confirmed by the Packaging section and Pin Description Table in the datasheet. All RC32334 derivatives use the same ball map, signal naming, and electrical characteristics - enabling drop-in frequency upgrades without PCB redesign.

What debug interfaces are available on the IDT79RC32V334-150BBI?

The IDT79RC32V334-150BBI provides IEEE 1149.1 JTAG boundary-scan and EJTAG in-circuit emulation interfaces. The EJTAG interface supports real-time debugging, non-intrusive program counter tracing, and breakpoint insertion without halting CPU execution - critical for validating time-sensitive communications firmware. Both interfaces share the jtag_tck, jtag_tdi, jtag_tdo, and jtag_trst_n pins as defined in the Pin Description Table.