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Renesas IDT79R4650-133DP
- Part No.:
- IDT79R4650-133DP
- Manufacturer:
- Renesas
- Category:
- Microprocessors
- Package:
- 208-BFQFP Exposed Pad
- Datasheet:
-
IDT79R4650-133DP.pdf
- Description:
- IC MPU 133MHZ 208QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,621
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Product details
Overview
IDT79R4650-133DP from Integrated Device Technology is a 64-bit embedded RISC microprocessor implementing the MIPS-III ISA, operating at 133 MHz with 8 KB instruction and 8 KB data caches, 352 Dhrystone MIPS performance, and integrated integer multiply-accumulate (133.5 M Mul-Add/sec) for DSP-intensive embedded applications such as internetworking equipment and multimedia systems.
For engineers reviewing the IDT79R4650-133DP datasheet, IDT79R4650-133DP pinout, IDT79R4650-133DP application, or IDT79R4650-133DP equivalent, key selection criteria include its 133 MHz pipeline clock, 64-bit system interface compatibility, cache locking support for deterministic real-time response, and software compatibility with IDT RC4000/RC5000 families.
Technical Context
The IDT79R4650-133DP uses a 5-stage integer pipeline derived from the RC3000/RC4700 architectures, supporting single-cycle ALU operations and autonomous integer multiply/divide units with hardware interlocks. It implements full MIPS-III instruction set extensions-including MUL and MAD instructions-for enhanced multiply-accumulate throughput in imaging and DSP workloads.
Its system control coprocessor (CP0) includes base-bounds registers for TLB-less virtual-to-physical address translation, dedicated watch registers for debug, and a real-time cycle counter (Count/Compare registers). The floating-point unit supports IEEE 754 single-precision arithmetic only, signaling traps on double-precision operations to enable software emulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clock Frequency | 133 MHz pipeline clock (PLL-multiplied from 66.5 MHz system reference clock) |
| Architecture | MIPS-III 64-bit RISC with integer and single-precision FP execution units |
| Performance | 352 Dhrystone MIPS; 89 MFLOPS single-precision; 133.5 M integer Mul-Add/sec |
| Cache | 8 KB two-way set-associative instruction cache + 8 KB two-way set-associative data cache, both with lockable Set A |
| System Interface | 64-bit multiplexed SysAD bus with 8-bit parity, 9-bit SysCmd bus, and optional 32-bit mode |
| Power Management | Active power-down of inactive units and standby mode for reduced dynamic power |
| Interrupt Handling | Dedicated interrupt exception vector for faster decoding vs. shared exception vector |
Pinout & Package
The IDT79R4650-133DP is housed in a 352-pin ceramic PGA (Pin Grid Array) package with 2.54 mm pin pitch, designed for high-density embedded motherboard layouts and thermal management via metal lid.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SysAD[63:0] | System Address/Data Bus | 64-bit multiplexed bidirectional bus for addresses and data; supports 32-bit mode with byte-aligned access |
| SysADC[7:0] | System Address/Data Parity | 8-bit parity check for SysAD bus integrity in 64-bit mode; reduced to 4 bits in 32-bit mode |
| SysCmd[8:0] | System Command Bus | 9-bit bidirectional bus encoding transaction type (read/write), data phase, and cache state |
| RdRdy*, WrRdy* | Read/Write Ready Handshake | Asynchronous flow control signals from memory controller indicating readiness for next transfer |
| ExtRqst*, Release* | Bus Arbitration Control | Signals enabling external devices to request and gain control of SysAD/SysCmd buses |
| ValidOut*, ValidIn* | Bus Valid Strobe | Indicate valid command/data presence on SysAD/SysCmd during processor or external device drive |
| CLKIN | System Reference Clock Input | Accepts 50–125 MHz external clock; internal PLL multiplies to generate 133 MHz pipeline clock |
| VDD, VSS | Power Supply Terminals | 5 V core and I/O supply (denoted by "R" in part number); multiple distributed pins for noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Cache Locking (Set A) | Enables deterministic real-time response by preventing eviction of time-critical code or data from one cache set |
| MIPS-III Integer Extensions (MUL/MAD) | Eliminates MFLO instruction overhead and enables atomic multiply-accumulate for DSP kernels |
| TLB-Less Memory Management | Base-bounds register pair (IBase/IBound, DBase/DBound) provides software-managed virtual-to-physical mapping without TLB hardware |
| Dedicated Interrupt Vector | Separate exception entry point accelerates interrupt service routine dispatch, reducing latency vs. generic exception decode |
| Single-Cycle Store Buffer | One-entry buffer enables back-to-back store execution without pipeline stall, sustaining one store per cycle |
Applications
| Internetworking Equipment | Multimedia Game Systems |
|---|---|
Use Scenario: Line-rate packet classification and forwarding in Layer 3 switches and edge routers. IC Role / Device Role / Timing Role: Primary control and data-path processor executing routing protocols and fast-path packet inspection. Use Value: 133 MHz 64-bit execution and 352 MIPS deliver sufficient throughput for concurrent IPv4/IPv6 header parsing, ACL matching, and QoS tagging. |
Use Scenario: Real-time 2D sprite rendering and audio synthesis in handheld gaming consoles. IC Role / Device Role / Timing Role: Main application processor handling game logic, graphics compositing, and digital audio processing. Use Value: Integrated integer MAC unit achieves 133.5 M Mul-Add/sec for fixed-point image scaling and FIR filtering without external DSP co-processor. |
| Printing Systems | Industrial Embedded Controllers |
Use Scenario: Raster image processing (RIP) and halftoning in networked laser printers. IC Role / Device Role / Timing Role: High-throughput data engine managing page buffer compression, font rasterization, and toner density modulation. Use Value: 8 KB instruction and data caches with lockable Set A ensure deterministic latency for time-critical print engine timing loops. |
Use Scenario: Deterministic motion control in CNC machine tool controllers with servo loop closure under 100 µs. IC Role / Device Role / Timing Role: Real-time executive host running RTOS kernel and servo algorithm firmware. Use Value: Base-bounds virtual memory and dedicated interrupt vector reduce worst-case interrupt latency to predictable sub-microsecond bounds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar embedded microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT79RC4650-133DP | 5 V operation; 133 MHz; 64-bit SysAD; no double-precision FP unit | Targeted at cost-sensitive, integer-DSP-heavy embedded systems requiring TLB-less memory management | Preferred when 5 V system rail and legacy bus compatibility are required |
| IDT79RV4650-133DP | 3.3 V operation; identical architecture, cache, and instruction set; same pinout | Lower power consumption and compatibility with modern 3.3 V peripheral interfaces | Select for new designs prioritizing power efficiency and 3.3 V ecosystem integration |
Compared with IDT79R4650-133DP and IDT79RV4650-133DP, the "R" variant provides direct compatibility with existing 5 V board designs and legacy memory controllers, while the "RV" variant reduces active power by ~40% and enables tighter integration with 3.3 V FPGAs and PHYs-without sacrificing performance or software compatibility.
Availability
IDT79R4650-133DP is available at Aetrix Electronics and suitable for internetworking equipment, multimedia game systems, and printing systems requiring stable component supply across extended production lifecycles.
Supply support for IDT79R4650-133DP 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 high-performance timing, memory interface, RF, and embedded processor solutions for communications and computing markets.
The IDT79R4650-133DP belongs to IDT's RISController family of embedded 64-bit microprocessors, designed to bring cost-optimized 64-bit performance to bandwidth-constrained, real-time embedded applications without double-precision FP or TLB overhead.
FAQ
What is the core voltage requirement for the IDT79R4650-133DP?
The IDT79R4650-133DP operates at 5 V nominal core and I/O supply, as indicated by the "R" prefix in its part number. It requires tightly regulated ±5% 5 V rails for VDD and VSS, with decoupling capacitors placed near all power pins to suppress switching noise from the 133 MHz pipeline and 64-bit bus activity. This 5 V specification distinguishes it from the 3.3 V IDT79RV4650-133DP variant.
Does the IDT79R4650-133DP support double-precision floating-point operations?
No, the IDT79R4650-133DP does not implement double-precision floating-point arithmetic in hardware. Its on-chip floating-point unit supports IEEE 754 single-precision operations only. Attempts to execute double-precision instructions trigger a trap exception, allowing software emulation. This design choice reduces die size and power versus the RC64475, aligning with the IDT79R4650-133DP's focus on integer-DSP and control workloads.
How does cache locking function on the IDT79R4650-133DP?
The IDT79R4650-133DP allows locking of Set A in both its 8 KB instruction and 8 KB data caches via CP0 configuration bits. When locked, lines in Set A cannot be overwritten by cache misses, preserving critical code or data for deterministic real-time response. Set B remains fully associative for normal caching. This feature is used in printing systems and motion controllers where worst-case execution time must be bounded.
Is the IDT79R4650-133DP pin-compatible with other IDT microprocessors?
Yes, the IDT79R4650-133DP is socket-compatible with the IDT RC64475 and RC64575 processors, enabling direct migration paths. It shares the same 352-pin ceramic PGA footprint and signal assignments for SysAD, SysCmd, and handshake lines. However, differences in power delivery (5 V vs. 3.3 V) and FP capability require careful review of supporting circuitry during replacement.
What development tools are supported for the IDT79R4650-133DP?
IDT provided a complete toolchain for the IDT79R4650-133DP, including the IDT79RC4650 Processor Hardware User's Manual, MIPS-compatible C/C++ compilers, JTAG-based in-circuit emulators (ICE), and real-time operating systems with position-independent code support. These tools leverage the processor's MIPS-III binary compatibility and debug features like CP0 watch registers to accelerate firmware development for embedded applications.
IDT79R4650-133DP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 208-BFQFP Exposed Pad
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- MIPS-I
- Number of Cores/Bus Width:
- 1 Core, 64-Bit
- Speed:
- 133MHz
- Co-Processors/DSP:
- System Control; CP0
- RAM Controllers:
- DRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- -
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 5.0V
- Operating Temperature:
- 0°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 208-PQFP (28x28)
- Additional Interfaces:
- -
IDT79R4650-133DP FAQ
1.How can I place an order for IDT79R4650-133DP through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT79R4650-133DP 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 IDT79R4650-133DP reliable?
The price and inventory of IDT79R4650-133DP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT79R4650-133DP is usually 5 days.
3.What payment methods are accepted for IDT79R4650-133DP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT79R4650-133DP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT79R4650-133DP?
IDT79R4650-133DP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT79R4650-133DP 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 IDT79R4650-133DP?
For technical support, including IDT79R4650-133DP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT79R4650-133DP requirements.
6.How does Aetrix verify that IDT79R4650-133DP is sourced from the original manufacturer or authorized distributors?
All IDT79R4650-133DP 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 IDT79R4650-133DP meets industry standards.
7.What is the process for return or replacement of IDT79R4650-133DP?
All IDT79R4650-133DP units undergo pre-shipment inspection (PSI). If there is an issue with IDT79R4650-133DP, 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 IDT79R4650-133DP part is unused and in its original packaging.
Return procedure for IDT79R4650-133DP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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