Renesas IDT79RC32V134-DS

Overview

IDT79RC32V134-DS from Integrated Device Technology is a 32-bit RISCore32300-family system controller IC designed for embedded CPU subsystems with the RC32364 microprocessor. It integrates SDRAM/EDODRAM control (up to 256 MB), PCI 2.1 bridge (32-bit/33 MHz), dual 16550-compatible UARTs, four DMA channels, and programmable I/O - enabling complete memory, I/O, and peripheral management in industrial and telecom edge systems.

For engineers reviewing the IDT79RC32V134-DS datasheet, IDT79RC32V134-DS pinout, IDT79RC32V134-DS application, or IDT79RC32V134-DS equivalent, key selection criteria include its 208-pin PQFP package, 3.3V core/I/O with 5V-tolerant inputs, big/little endian support, and integrated boot PROM interface for cold/warm reset sequencing.

Technical Context

The IDT79RC32V134-DS implements a tightly coupled system controller architecture with direct RC32364 CPU bus interfacing, internal address latching, and region-based physical address mapping across 14 memory/peripheral regions. Its memory controller supports six configurable banks (8/16/32-bit) with Intel/Motorola-style wait-state generation and optional external data buffer control via FCT245 transceiver signals.

Its SDRAM/EDODRAM controller shares pin resources but operates exclusively in one mode at boot time, supporting non-interleaved 4-bank configurations (64 MB/bank, 256 MB total) with built-in refresh. The PCI interface operates as host or satellite, includes on-chip 3-slot arbiter, EEPROM configuration loading, and endian-swapping for cross-endian transfers.

Key Specifications

Pinout & Package

208-pin PQFP (Plastic Quad Flat Package), 28 × 28 mm body, 0.65 mm pitch, JEDEC MS-026AC compliant. Thermal resistance ∅CA = 18°C/W (still air) to 7°C/W (1000 ft/min airflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar system controller applications.

Compared with IDT79RC32V134-DS, IDT79RC32364-DS consolidates CPU and controller but sacrifices peripheral configurability, while AMD SC520 abandons the RISCore32300 architecture entirely - making IDT79RC32V134-DS uniquely suited for deterministic, modular embedded subsystems requiring PCI expansion and multi-standard memory support.

Availability

IDT79RC32V134-DS is available at Aetrix Electronics and suitable for telecom line card control, industrial PLC backplane interface, and network router management modules requiring stable component supply across extended product lifecycles.

Supply support for IDT79RC32V134-DS 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 timing, memory interface, RF, and embedded processor solutions before its acquisition by Renesas Electronics in 2019.

The IDT79RC32V134-DS belongs to the RISCore32300 family of system controllers, engineered specifically to complement IDT's RC32364 32-bit RISC CPU in high-reliability embedded networking and industrial control applications.

FAQ

What is the primary function of the IDT79RC32V134-DS in an embedded system?

The IDT79RC32V134-DS serves as a dedicated system controller IC that manages memory (SRAM, Flash, SDRAM, EDO DRAM), I/O peripherals, PCI expansion, and on-chip functions (DMA, UARTs, timers, interrupts) for the RC32364 CPU. It replaces discrete glue logic, enabling compact, high-integration embedded subsystems in telecom and industrial applications - a role confirmed in the device overview and block diagram of the official datasheet.

Does the IDT79RC32V134-DS support both big-endian and little-endian CPU configurations?

Yes, the IDT79RC32V134-DS explicitly supports both big-endian and little-endian operation modes as stated in its Features section and Device Overview. This capability extends to its DMA controller, which includes per-channel endianness swappers to align data transfers between CPU and PCI or memory domains - critical for interoperability in mixed-architecture systems.

Can the IDT79RC32V134-DS operate with SDRAM and EDO DRAM simultaneously?

No, the IDT79RC32V134-DS cannot operate SDRAM and EDO DRAM simultaneously. As documented in the SDRAM and EDO DRAM Controller sections, the two controllers share physical pins and are mutually exclusive; selection is made at boot-time via system software. Only one DRAM type may be enabled per power cycle.

What package type and thermal specifications apply to the IDT79RC32V134-DS?

The IDT79RC32V134-DS uses a 208-pin PQFP package (28 × 28 mm, 0.65 mm pitch) with thermal resistance ∅CA ranging from 18°C/W (still air) to 7°C/W (1000 ft/min airflow). It is rated for industrial temperature operation from –40°C to +90°C case temperature, as specified in the Thermal Considerations section of the datasheet.

How does the IDT79RC32V134-DS handle PCI configuration and initialization?

The IDT79RC32V134-DS supports PCI configuration via on-chip serial EEPROM interface (pci_eeprom_mdo/mdi/cs/sk pins) for loading configuration registers during reset. It operates in either host or satellite mode, with pci_idsel and pci_req_n[2] pins repurposed accordingly. Configuration space access is enabled through standard PCI memory/I/O read/write commands targeting the RC32134's internal registers - as detailed in the PCI Interface section.