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Renesas IDT79R3041-20PFG
- Part No.:
- IDT79R3041-20PFG
- Manufacturer:
- Renesas
- Category:
- Microprocessors
- Package:
- 100-LQFP
- Datasheet:
-
IDT79R3041-20PFG.pdf
- Description:
- IC MPU 20MHZ 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,892
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Product details
Overview
IDT79R3041-20PFG from Integrated Device Technology is a 32-bit MIPS RISC microprocessor with integrated instruction cache (2 kB), data cache (512 B), programmable bus interface, on-chip DMA arbiter, and 24-bit timer. It operates at 20 MHz, delivers 20 MIPS performance, and targets cost-sensitive embedded systems such as laser printer controllers and low-cost networked peripherals.
For engineers reviewing the IDT79R3041-20PFG datasheet, IDT79R3041-20PFG pinout, IDT79R3041-20PFG application, or IDT79R3041-20PFG equivalent, key selection criteria include its 84-pin PLCC package, 8-/16-/32-bit programmable port width support, double-frequency clock input (ClkIn), and software compatibility with the IDT RISController family including R3051/R3052/R3081.
Technical Context
The IDT79R3041-20PFG implements the MIPS-I ISA with a five-stage pipeline and binary compatibility to the IDT79R3000A CPU core. Its execution engine supports single-cycle ALU operations, 1.3-cycle effective load time, and autonomous multiply/divide unit operation independent of the main ALU.
System control is managed by an on-chip CP0 co-processor that handles exception control, cache configuration, bus timing, port size mapping, and 24-bit timer functions - all programmable via dedicated registers without requiring external logic or TLB support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clock Frequency | 20 MHz operation - enables deterministic real-time response in embedded control loops without external PLL. |
| Performance | 20 MIPS at 25 MHz - sustained integer throughput achievable from on-chip caches, eliminating need for fast external SRAM. |
| Instruction Cache | 2 kB direct-mapped physical-address cache - reduces instruction fetch latency from slow EPROM/DRAM, supporting PDL interpreters in printers. |
| Data Cache | 512 B write-through direct-mapped cache - ensures memory coherency while buffering writes via 4-deep FIFO to avoid execution stalls. |
| Bus Interface | Programmable 8-/16-/32-bit port width per memory sub-region - allows mixed-width memory systems (e.g., 8-bit boot PROM + 32-bit DRAM) without external packing logic. |
| Timer | On-chip 24-bit programmable timer - usable for DRAM refresh or general-purpose timing without external counter ICs. |
| Package | 84-pin PLCC (cavity-down) - low-cost, socket-compatible packaging suitable for industrial temperature range PCB assembly. |
Pinout & Package
Package: 84-pin Plastic Leaded Chip Carrier (PLCC), cavity-down, commercial temperature range (0°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A/D(31:0) | Time-multiplexed address/data bus | Carries 32-bit physical address in first phase, then bidirectional data; eliminates separate address bus traces and reduces pin count. |
| ALE | Address Latch Enable | Strobes high during address phase to latch A/D bus contents into external latch; supports extended hold time for low-cost FPGAs/ASICs. |
| ClkIn | Double-frequency clock input | Accepts 40 MHz signal to generate internal 20 MHz SysClk; removes need for external clock divider or delay line used in R3000A designs. |
| SysClk | System clock output | Provides synchronized reference for external logic timing; feedback-controlled to minimize setup/hold violations on A/D and control signals. |
| BE16(1:0) | Byte enable strobes | Selects active 16-bit lanes during transfers; configurable per memory region to match narrow peripheral interfaces (e.g., RS-232 UARTs). |
| TC | Timer Count output | Drives external interrupt or refresh signal; tied directly to CP0 Count/Compare register for precise periodic event generation. |
Key Features
| Feature | Design Value |
|---|---|
| Instruction and data caches | 2 kB instruction + 512 B data caches reduce external memory bandwidth demand, enabling use of low-cost DRAM/EPROM in laser printer firmware stacks. |
| Programmable port width interface | Kernel-configurable 8-/16-/32-bit memory sub-regions allow boot from 8-bit PROM while executing from 32-bit DRAM - no external data rotation logic required. |
| 4-deep write buffer | Decouples CPU store rate from memory write speed, preventing pipeline stalls during burst writes to slow peripherals or flash memory. |
| On-chip DMA arbiter | Enables external masters (e.g., SCSI controller or LAN MAC) to share system bus without CPU intervention or additional arbitration logic. |
| Configurable endian mode | Runtime switchable big/little-endian operation simplifies integration with legacy databases or cross-architecture communication protocols. |
Applications
| Laser Printer Controller | Networked Peripheral Bridge |
|---|---|
|
Use Scenario: Executes Adobe PostScript™ interpreter and manages page rasterization, font rendering, and engine timing in mid-range laser printers. IC Role / Device Role / Timing Role: Primary RISC controller handling real-time print engine synchronization, DRAM frame buffer management, and serial/parallel I/O. Use Value: Integrated caches and burst read support enable high-speed raster image transfer from 16-bit DRAM; programmable port width allows direct interfacing to 8-bit boot PROM and 32-bit font cartridges. |
Use Scenario: Acts as protocol translation bridge between USB host and legacy RS-422/SCSI peripherals in industrial test equipment. IC Role / Device Role / Timing Role: Embedded host processor managing dual-bus arbitration, packet buffering, and firmware-upgradable command parsing. Use Value: On-chip DMA arbiter offloads data movement from CPU; 24-bit timer provides precise inter-packet gap timing; software compatibility enables reuse of R3051 debug toolchain. |
| Low-Cost Fax/Image Processor | Field-Upgradeable Control Module |
|
Use Scenario: Processes scanned document images, applies compression (TIFF/G3), and manages modem handshaking in entry-level fax machines. IC Role / Device Role / Timing Role: Real-time image processing engine with memory-mapped I/O for CCD sensor interface and flash storage access. Use Value: Write-through data cache ensures consistent image buffer updates; 4-deep read buffer enables efficient burst reads from 16-bit NAND flash for firmware overlays. |
Use Scenario: Serves as field-replaceable main controller in HVAC control panels, supporting hardware upgrades from 16-bit to 32-bit memory subsystems. IC Role / Device Role / Timing Role: Pin- and software-compatible drop-in replacement for higher-tier RISController variants (e.g., R3051) without PCB redesign. Use Value: Identical 84-pin PLCC footprint and reset configuration mode inputs allow seamless migration; same CP0 register map preserves kernel driver compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RISC microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT79R3051-20PFG | 4 kB instruction cache, 2 kB data cache, includes full MMU with 64-entry TLB | Required for virtual memory OS environments (e.g., VxWorks); not needed for bare-metal or RTOS-based printer firmware | Select IDT79R3051-20PFG only if TLB-based memory protection or kernel/user mode isolation is mandatory. |
| IDT79RV3041-20PFG | Same core and cache specs, but rated for extended temperature range (–40°C to +100°C) | Suitable for automotive or outdoor industrial enclosures where ambient exceeds 85°C | Choose IDT79RV3041-20PFG when operating temperature exceeds commercial grade limits; otherwise IDT79R3041-20PFG offers identical functionality at lower cost. |
Compared with IDT79R3051-20PFG and IDT79RV3041-20PFG, the IDT79R3041-20PFG delivers optimal cost-performance balance for fixed-function embedded systems where MMU support or extended temperature operation is unnecessary - retaining full software and pin compatibility while minimizing BOM cost.
Availability
IDT79R3041-20PFG is available at Aetrix Electronics and suitable for laser printer controllers, networked peripheral bridges, and low-cost fax/image processors requiring stable component supply across multi-year production cycles.
Supply support for IDT79R3041-20PFG 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 high-performance timing, memory interface, and embedded processor solutions before its acquisition by Renesas Electronics in 2019.
The IDT79R3041-20PFG belongs to the RISController family - designed specifically to bring MIPS RISC performance to cost-sensitive embedded applications through high integration, eliminating external caches, bus controllers, and clock management ICs.
FAQ
What is the maximum operating frequency of the IDT79R3041-20PFG?
The IDT79R3041-20PFG is rated for 20 MHz operation, corresponding to a 40 MHz ClkIn signal due to its double-frequency clock input architecture. It achieves 20 MIPS performance at 25 MHz, but the -20 suffix confirms this specific variant is characterized and guaranteed up to 20 MHz under commercial temperature conditions.
Does the IDT79R3041-20PFG support hardware floating-point operations?
No, the IDT79R3041-20PFG does not include a hardware floating-point unit. Floating-point operations are handled via software emulation libraries provided by IDT, such as the IDT floating point emulation library referenced in the development support documentation.
Is the IDT79R3041-20PFG pin-compatible with other RISController family members?
Yes, the IDT79R3041-20PFG is superset pin-compatible with the base RISController family including IDT79R3051, IDT79R3052, and IDT79R3081 in the same 84-pin PLCC package. This allows hardware reuse across performance tiers while maintaining identical signal routing and socket layout.
What memory interface widths does the IDT79R3041-20PFG support?
The IDT79R3041-20PFG supports programmable 8-bit, 16-bit, and 32-bit memory port widths per physical address sub-region. This capability is controlled via the Port Size Control Register in CP0 and enables transparent interfacing to mixed-width memory systems without external data packing logic.
What is the function of the SysClk pin on the IDT79R3041-20PFG?
The SysClk pin outputs a buffered, feedback-stabilized 20 MHz system clock derived from ClkIn. It serves as a timing reference for external logic (e.g., DRAM controllers or I/O peripherals), with minimized skew due to internal feedback from the bus interface unit - critical for meeting tight setup/hold timing margins.
IDT79R3041-20PFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 100-LQFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- MIPS-I
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 20MHz
- 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:
- 100-TQFP (14x14)
- Additional Interfaces:
- -
IDT79R3041-20PFG FAQ
1.How can I place an order for IDT79R3041-20PFG through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT79R3041-20PFG 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 IDT79R3041-20PFG reliable?
The price and inventory of IDT79R3041-20PFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT79R3041-20PFG is usually 5 days.
3.What payment methods are accepted for IDT79R3041-20PFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT79R3041-20PFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT79R3041-20PFG?
IDT79R3041-20PFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT79R3041-20PFG 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 IDT79R3041-20PFG?
For technical support, including IDT79R3041-20PFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT79R3041-20PFG requirements.
6.How does Aetrix verify that IDT79R3041-20PFG is sourced from the original manufacturer or authorized distributors?
All IDT79R3041-20PFG 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 IDT79R3041-20PFG meets industry standards.
7.What is the process for return or replacement of IDT79R3041-20PFG?
All IDT79R3041-20PFG units undergo pre-shipment inspection (PSI). If there is an issue with IDT79R3041-20PFG, 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 IDT79R3041-20PFG part is unused and in its original packaging.
Return procedure for IDT79R3041-20PFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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