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Renesas 79RC32H434-266BC
- Part No.:
- 79RC32H434-266BC
- Manufacturer:
- Renesas
- Category:
- Microprocessors
- Package:
- 256-LBGA
- Datasheet:
-
79RC32H434-266BC.pdf
- Description:
- IC MPU INTERPRISE 266MHZ 256BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,225
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Product details
Overview
79RC32H434-266BC from Integrated Device Technology (IDT) is a 32-bit MIPS32-compatible integrated communications processor with PCI 2.2 interface, 10/100 Mbps Ethernet MAC, DDR SDRAM controller (16-bit, up to 256 MB), and on-chip DMA engine. It serves as a system-on-chip controller in embedded networking equipment such as industrial gateways and telecom edge devices.
For engineers reviewing the 79RC32H434-266BC datasheet, 79RC32H434-266BC pinout, 79RC32H434-266BC application, or 79RC32H434-266BC equivalent, key selection criteria include its 266 MHz CPU clock rating, SSTL_2 DDR I/O interface, PCI host/satellite dual-mode operation, and integrated MII/RMII Ethernet PHY interface compatibility.
Technical Context
The 79RC32H434-266BC implements the MIPS Technologies 4Kc CPU core with 8 KB instruction and 8 KB data caches, 4-way set associative, line locking, and non-blocking prefetches. It includes a memory management unit (MMU) and EJTAG v2.5 debug interface for full-system emulation and software development.
Its PCI interface supports both host and satellite modes with internal arbiter for up to six external masters, while the DDR controller delivers 16-bit wide x8/x16 DDR SDRAM support with automatic refresh, differential clocking (DDRCKP/DDRCKN), and SSTL_2 signaling compliant with JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | MIPS32-compatible 4Kc core, 266 MHz max frequency, 5-stage pipeline, integer-optimized execution |
| Cache | 8 KB instruction + 8 KB data cache, 4-way set associative, per-line lockable for real-time code/data retention |
| PCI Interface | 32-bit, revision 2.2 compliant; supports synchronous/asynchronous operation; 16–66 MHz clock range |
| Ethernet MAC | IEEE 802.3-compliant 10/100 Mbps MAC with MII/RMII support, 64-entry hash-based multicast filtering |
| DDR Controller | 16-bit data bus, supports x8/x16 DDR SDRAM up to 1 Gb density; SSTL_2 I/O, differential clock outputs (DDRCKP/DDRCKN) |
| DMA Channels | 6 independent channels: 2 for PCI ↔ memory, 2 for Ethernet ↔ memory, 2 for memory ↔ memory with unaligned transfer support |
| UART | 16550-compatible serial channel with 16-byte FIFOs, programmable baud rate, 5–8 bit word length, parity and stop-bit configuration |
Pinout & Package
79RC32H434-266BC is housed in a 324-pin PBGA package (27 mm × 27 mm, 1.0 mm pitch) with mixed-signal I/O banks: LVTTL for peripheral/memory bus, SSTL_2 for DDR, PCI-compliant for PCI bus, and dedicated MII/RMII and I²C signal routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Master Clock Input | Drives internal PLL; system clock source for CPU, memory, and peripheral buses; requires stable 266 MHz reference or lower-frequency crystal with multiplication |
| DDRCKP / DDRCKN | Differential DDR Clock Outputs | Provide phase-matched 180° complementary clocks to DDR SDRAM; enable double-data-rate timing at up to 133 MHz effective frequency |
| PCIAD[31:0] | PCI Multiplexed Address/Data Bus | Time-multiplexed 32-bit bus used for address latching (during FRAMEN assertion) and data transfer (read/write phases) |
| MADDR[21:0] / MDATA[7:0] | Memory & Peripheral Bus | Demultiplexed 22-bit address + 8-bit data bus with BDIRN/BOEN/WEN control; supports glueless interface to SRAM, Flash, and peripherals |
| MIIRXD[3:0] / MIITXD[3:0] | MII Receive/Transmit Data | Nibble-wide (4-bit) MII interface signals; compatible with standard PHYs; also serve as RMII RXD[1:0]/TXD[1:0] when configured for reduced pin count |
| SCL / SDA | I²C Bus Interface | Open-drain bidirectional lines supporting 100 kbps standard mode and 400 kbps fast mode; require 2.2 kΩ external pull-ups per IDT specification |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMA Engine | 6-channel descriptor-based DMA with scatter/gather support and byte-aligned/unaligned transfers-reduces CPU load during high-throughput packet forwarding |
| PCI Dual-Mode Operation | Configurable as host (with internal 6-master arbiter) or satellite (PCI target)-enables flexible system architecture in add-in cards or mainboard controllers |
| DDR Memory Controller | Full JEDEC-compliant DDR interface with automatic refresh, bank addressing (DDRBA[1:0]), and data mask (DDRDM[1:0])-eliminates need for external memory controller logic |
| Debug & Emulation Support | EJTAG v2.5 interface with ICE compatibility, hardware breakpoints on virtual addresses, and single-stepping-enables low-level firmware bring-up and real-time debugging |
| Flexible Boot Configuration | External boot vector loading via EXTBCV pin and MDATA[7:0] inputs during cold reset-supports multiple flash/SRAM boot sources without hardware redesign |
Applications
| Industrial Protocol Gateway | Telecom Edge Router |
|---|---|
|
Use Scenario: Aggregating Modbus RTU, CAN, and Profibus fieldbus traffic into IP-based backhaul networks. IC Role / Device Role / Timing Role: Central protocol translation and packet forwarding engine with deterministic interrupt latency from GPIO and UART peripherals. Use Value: On-chip 10/100 Ethernet MAC and PCI interface enable direct connection to network processors or PHYs; DDR controller supports local packet buffering up to 256 MB. |
Use Scenario: Low-cost DSL/cable modem termination units requiring integrated routing, QoS, and VoIP media processing. IC Role / Device Role / Timing Role: System controller managing ATM/PTM framing, TCP/IP stack offload, and voice codec interfacing via SPI/I²C. Use Value: 266 MHz MIPS32 CPU with MMU enables Linux or VxWorks deployment; integrated UART and GPIO support legacy serial console and status LED control. |
| Network Attached Storage Controller | Secure Remote Access Appliance |
|
Use Scenario: Embedded NAS platforms requiring SATA-to-Ethernet bridging with RAID metadata handling and SMB/CIFS acceleration. IC Role / Device Role / Timing Role: Host processor coordinating disk I/O via PCI, managing Ethernet packet flow, and executing file system logic in DDR-resident memory. Use Value: PCI master capability allows direct attachment of SATA controllers; DDR bandwidth supports concurrent read/write caching; DMA channels minimize CPU involvement in data movement. |
Use Scenario: Firewall/VPN appliances deployed in branch offices with strict physical security and remote management requirements. IC Role / Device Role / Timing Role: Trusted execution environment host with watchdog timer (NMI on timeout), address space monitor for undecoded access detection, and secure boot vector validation. Use Value: System integrity functions detect memory corruption; JTAG/EJTAG lockdown options prevent unauthorized debug access; industrial temp grade (-40°C to +85°C) ensures reliability in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar integrated communications processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMCC PowerPC MPC8247 | PowerPC 740/750 core, 333 MHz; lacks integrated DDR controller; uses external SDRAM | Requires external memory controller and PHY interface; better suited for legacy PowerPC toolchain ecosystems | Select when migrating existing PowerPC firmware or needing higher single-thread integer throughput than MIPS32 4Kc |
| Intel IXP425 | ARM XScale core, 533 MHz; integrated crypto accelerator; no native PCI interface (uses PCI-X bridge) | Superior for IPsec offload and firewall throughput; limited DDR support (only 32-bit, no x8/x16 flexibility) | Select when cryptographic acceleration or ARM software ecosystem compatibility is prioritized over PCI integration and DDR configurability |
Compared with AMCC MPC8247 and Intel IXP425, the 79RC32H434-266BC offers tighter integration of PCI, DDR, and Ethernet in a single chip with MIPS toolchain maturity, making it optimal for cost-sensitive, medium-throughput embedded networking where glue logic reduction and memory flexibility are critical.
Availability
79RC32H434-266BC is available at Aetrix Electronics and suitable for industrial protocol gateways, telecom edge routers, and network-attached storage controllers requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 79RC32H434-266BC 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, interface, and memory connectivity solutions for communications, computing, and industrial markets.
The RC32434 product line was designed as part of IDT's Interprise™ family to deliver highly integrated, PCI-based communications processors targeting embedded networking infrastructure with minimal external logic.
FAQ
What is the maximum DDR SDRAM density supported by the 79RC32H434-266BC?
The 79RC32H434-266BC supports DDR SDRAM densities up to 1 Gb per device, enabling configurations up to 256 MB total memory using a single 16-bit x16 device. Its DDR controller implements JEDEC-compliant timing, bank addressing (DDRBA[1:0]), and automatic refresh-verified in the January 2006 datasheet revision.
Does the 79RC32H434-266BC support both PCI host and target modes simultaneously?
No-the 79RC32H434-266BC operates in either PCI host mode (with internal arbiter supporting up to six external masters) or satellite (target) mode, selected at boot time via configuration pins. Simultaneous dual-role operation is not supported; mode selection is static and requires hardware configuration before initialization.
What boot interfaces does the 79RC32H434-266BC provide?
The 79RC32H434-266BC loads its boot configuration vector during cold reset via MDATA[7:0] inputs when EXTBCV is asserted high. Supported boot sources include parallel NOR Flash, SRAM, or ROM connected to the 8-bit memory/peripheral bus-no serial flash or SD card boot capability is integrated.
Is the 79RC32H434-266BC pin-compatible with other RC32434 speed grades?
Yes-the 79RC32H434-266BC shares identical pinout, package (324-pin PBGA), and signal definitions with other RC32434 variants (e.g., -200BC, -233BC). Differences are limited to AC timing specifications and maximum operating frequency; PCB layout is fully reusable across speed grades.
What debug interfaces are available on the 79RC32H434-266BC?
The 79RC32H434-266BC provides IEEE 1149.1 JTAG boundary scan and enhanced JTAG (EJTAG) v2.5 compliant debug interface with TDI, TDO, TMS, TCK, and TRST_N pins. It supports hardware breakpoints on virtual addresses, single-stepping, and ICE tool integration-fully documented in the CPU Execution Core section of the datasheet.
79RC32H434-266BC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 256-LBGA
- Series:
- Interprise™
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- MIPS32
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 266MHz
- Co-Processors/DSP:
- -
- RAM Controllers:
- DDR
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10/100Mbps (1)
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CABGA (17x17)
- Additional Interfaces:
- I2C, PCI, SPI, UART
79RC32H434-266BC FAQ
1.How can I place an order for 79RC32H434-266BC through Aetrix?
Please submit a Request for Quotation (RFQ) for 79RC32H434-266BC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 79RC32H434-266BC reliable?
The price and inventory of 79RC32H434-266BC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 79RC32H434-266BC is usually 5 days.
3.What payment methods are accepted for 79RC32H434-266BC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 79RC32H434-266BC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 79RC32H434-266BC?
79RC32H434-266BC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 79RC32H434-266BC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 79RC32H434-266BC?
For technical support, including 79RC32H434-266BC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 79RC32H434-266BC requirements.
6.How does Aetrix verify that 79RC32H434-266BC is sourced from the original manufacturer or authorized distributors?
All 79RC32H434-266BC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 79RC32H434-266BC meets industry standards.
7.What is the process for return or replacement of 79RC32H434-266BC?
All 79RC32H434-266BC units undergo pre-shipment inspection (PSI). If there is an issue with 79RC32H434-266BC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 79RC32H434-266BC part is unused and in its original packaging.
Return procedure for 79RC32H434-266BC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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