Renesas IDT79RC32V334-133BB

Overview

IDT79RC32V334-133BB from Integrated Device Technology is a 32-bit integrated communications processor based on the RISCore32300 CPU core implementing the Enhanced MIPS-II ISA. It operates at up to 133 MHz, integrates an 8 kB 2-way set associative instruction cache and 2 kB 2-way set associative data cache, and supports big/little endian operation with MMU and 32-page TLB for multitasking - deployed in network edge routers requiring deterministic real-time packet processing.

For engineers reviewing the IDT79RC32V334-133BB datasheet, IDT79RC32V334-133BB pinout, IDT79RC32V334-133BB application, or IDT79RC32V334-133BB equivalent, key selection criteria include SDRAM controller support for up to 512 MB across 4 banks, dual 16550-compatible UARTs with 1.5 Mb/s baud rate, and PCI 2.2-compliant 32-bit/66 MHz bridge with host/satellite mode flexibility.

Technical Context

The IDT79RC32V334-133BB implements a 5-stage scalar pipeline CPU core with cache prefetch, conditional move, and DSP instructions - enabling routing and VoIP compression tasks. Its memory subsystem includes programmable cache write policies (write-through no-write-allocate, write-back) and per-line locking for real-time latency control.

The integrated peripherals include a 4-channel DMA controller supporting unaligned, scatter/gather, and burst transfers; SDRAM controller with automatic refresh and 16–512 Mb device depth support; and local bus interface with 26-bit address/32-bit data width, 6 chip-selects, and flexible timing for mixed 8/16/32-bit devices.

Key Specifications

Pinout & Package

The IDT79RC32V334-133BB is housed in a 256-ball PBGA package with 1.0 mm ball pitch, designed for high-density embedded board layouts and thermal dissipation under 2.1 W peak power.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AMD Alchemy Au1500 and Freescale MPC8245, the IDT79RC32V334-133BB delivers optimal balance of PCI 2.2 bridging, SDRAM cost efficiency, and real-time determinism for mid-tier embedded networking - without requiring DDR layout or USB/LCD subsystems.

Availability

IDT79RC32V334-133BB is available at Aetrix Electronics and suitable for network edge routers, industrial protocol gateways, VoIP media gateways, and legacy system adapter cards requiring stable component supply across extended product lifecycles.

Supply support for IDT79RC32V334-133BB 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 timing, memory interface, RF, and high-performance embedded processors for communications infrastructure.

The IDT79RC32V334-133BB belongs to the Interprise™ integrated communications processor family, designed to unify CPU, memory, I/O, and PCI connectivity in single-chip solutions for cost-sensitive, real-time embedded networking applications.

FAQ

What is the maximum SDRAM capacity supported by the IDT79RC32V334-133BB?

The IDT79RC32V334-133BB supports up to 512 MB of total SDRAM across four independent banks. It accommodates device densities from 16 Mb to 512 Mb and works with discrete chips, SODIMMs, or standard DIMMs - all managed by its integrated SDRAM controller with automatic refresh generation and on-chip page comparators for latency optimization.

Does the IDT79RC32V334-133BB support both PCI host and satellite modes?

Yes, the IDT79RC32V334-133BB supports both PCI host and satellite modes. In host mode, it acts as a PCI bus master controlling peripherals; in satellite mode, it functions as a PCI target with warm reset capability and uses pins like pci_req_n[2] as pci_idsel for configuration space access - enabling flexible integration into either add-in cards or system controller roles.

What cache management policies are implemented in the IDT79RC32V334-133BB?

The IDT79RC32V334-133BB implements three programmable cache management policies per memory page: write-through with no write allocation, write-through with write allocation, and write-back. These are controlled via cache control registers and enable precise tuning of memory coherency and bandwidth usage for real-time and general-purpose workloads.

Can the IDT79RC32V334-133BB operate in industrial temperature range?

Yes, the IDT79RC32V334-133BB is qualified for industrial temperature operation from −40°C to +85°C. This rating is explicitly confirmed in the thermal considerations section of the datasheet, and the device consumes less than 2.1 W peak power - making it suitable for fanless, sealed industrial enclosures without thermal derating.

How many UART interfaces does the IDT79RC32V334-133BB integrate, and what are their capabilities?

The IDT79RC32V334-133BB integrates two fully independent 16550-compatible UARTs. Each supports baud rates up to 1.5 Mb/s, with channel 0 providing full modem control signals (CTS, DSR, DTR, RTS). Both UARTs are accessible via memory-mapped registers and support FIFO operation, enabling robust serial communication for console, debugging, and fieldbus protocol translation.