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Renesas CA91L862A-50IE
- Part No.:
- CA91L862A-50IE
- Manufacturer:
- Renesas
- Category:
- Specialized
- Package:
- 256-BBGA
- Datasheet:
-
CA91L862A-50IE.pdf
- Description:
- IC INTERFACE SPECIALIZED 256BGA
- Quantity:
- Payment:
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Product details
Overview
CA91L862A-50IE from IDT (Integrated Device Technology) is a QSpan II™ PCI-to-QBus bridge controller IC enabling high-bandwidth, low-latency interconnect between PCI bus systems and Motorola/Freescale QBus-based processors including MC68360, MPC860, and M68040. It supports dual-channel operation (QBus Slave + PCI Target), 32-bit/33 MHz PCI interface, 16/32-bit QBus data width, and integrated IDMA/DMA engines. It is used in industrial control backplanes and legacy embedded communications equipment requiring protocol translation and hot-swap support.
For engineers reviewing the CA91L862A-50IE datasheet, CA91L862A-50IE pinout, CA91L862A-50IE application, or CA91L862A-50IE equivalent, this page delivers verified technical context, register-level channel architecture, timing-critical DC characteristics, and real-world use cases for QBus–PCI bridging in CompactPCI and QUICC-based systems.
Technical Context
The CA91L862A-50IE implements five concurrent data channels: QBus Slave (PCI-initiated QBus access), PCI Target (QBus-initiated PCI access), IDMA (PCI-side direct memory access), DMA (QBus-side burst transfers), and Register Channel (synchronized configuration space access). Each channel maintains independent FIFOs (Qx/Pr/Px/Qr) and parity-checked data paths with endian-aware mapping logic.
It features hardware-assisted transaction ordering control, programmable wait-state insertion per QBus cycle type, JTAG boundary scan (IEEE 1149.1), EEPROM-based plug-and-play configuration via I²C, and full CompactPCI hot-swap signaling compliance (including PME# and INTA# assertion). Reset behavior is configurable via strap pins and EEPROM bits for master/slave mode selection and PCI arbitration enablement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCI Interface | 32-bit, 33 MHz, compliant with PCI Rev 2.1; supports memory and I/O transactions, target and bus-master roles. |
| QBus Interface | 16/32-bit multiplexed address/data; supports MC68360, MPC860, and M68040 timing protocols with programmable wait states. |
| IDMA Engine | Dedicated PCI-side DMA controller supporting scatter-gather lists and auto-increment addressing for host memory access. |
| EEPROM Support | On-chip I²C interface for external serial EEPROM (24C02–24C16); stores VPD, configuration registers, and boot settings. |
| Hot Swap | Fully compliant with PICMG 2.1 CompactPCI Hot Swap specification; includes dedicated HSCNTL#, PRSNT1#, PRSNT2# signal handling. |
| Power Management | Supports PCI Power Management Event (PME#) signaling and D0–D3hot state transitions per PCI PM 1.1. |
| JTAG Test Access | IEEE 1149.1-compliant TAP controller for boundary scan testing and in-system programming of configuration registers. |
Pinout & Package
CA91L862A-50IE is housed in a 256-pin Ball Grid Array (BGA) package with 1.27 mm pitch, thermally enhanced for industrial temperature operation (–40°C to +85°C). Pin assignment follows QSpan II architecture with dedicated banks for PCI signals (AD[31:0], C/BE[3:0]#, PAR), QBus signals (QA[23:0], QD[15:0]/[31:0], QCLK, QRESET#), and system control (HSCNTL#, PME#, JTAG TCK/TMS/TDI/TDO).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AD[31:0] | PCI Address/Data Multiplexed Bus | Bi-directional 32-bit time-multiplexed address/data lines; requires external latch for address capture on PCI clock rising edge. |
| C/BE[3:0]# | PCI Command/Byte Enable | Active-low byte enables defining valid data lanes during transfer; encodes memory/I/O/read/write commands. |
| QA[23:0] | QBus Address Lines | 24-bit non-multiplexed address bus for QBus slave/target operations; supports up to 16 MB QBus address space. |
| QD[15:0]/[31:0] | QBus Data Lines | Configurable 16-bit or 32-bit bidirectional data path; width selected at reset via EEPROM or strap pins. |
| HSCNTL# | Hot Swap Control Input | Active-low input monitored during card insertion/extraction; triggers internal hot-swap state machine and disables PCI bus drivers. |
| PME# | Power Management Event Output | Open-drain active-low signal asserted to request PCI power state transition (e.g., wake from D3cold). |
| TCK, TMS, TDI, TDO | JTAG Boundary Scan Interface | Standard IEEE 1149.1 test access port; enables production testing, debug visibility, and register programming without CPU involvement. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Channel Bridge Architecture | Simultaneous QBus Slave (PCI→QBus) and PCI Target (QBus→PCI) operation eliminates software polling overhead and enables zero-copy data movement. |
| Configurable QBus Timing | Per-cycle wait-state insertion (0–7 cycles) for MC68360/MPC860/M68040 compatibility; eliminates need for external glue logic in mixed-processor designs. |
| I²C EEPROM Bootloader | Loads configuration registers, VPD, and hot-swap parameters at power-on; enables field-upgradable firmware and board identification without host CPU intervention. |
| CompactPCI Hot Swap Compliance | Hardware-managed insertion/extraction sequencing per PICMG 2.1; includes presence detection, power ramp control, and bus isolation logic. |
| PCI Configuration Space Access | Full Type 0/1 header support via Register Channel; allows QBus-side read/write of PCI vendor/device IDs, BARs, and command/status registers. |
| Interrupt Aggregation & Routing | Combines QBus interrupt sources (QINT#, QIRQ[3:0]) and PCI INTA# into single programmable output; reduces IRQ resource contention in multi-slot systems. |
Applications
| Industrial Backplane Controller | Legacy Communications Gateway |
|---|---|
|
Use Scenario: Retrofitting aging MC68360-based telemetry controllers into modern PCI-based rack-mount chassis with hot-swap capability. IC Role / Device Role / Timing Role: Acts as protocol translator and timing adapter-converting PCI memory-mapped I/O cycles into QBus burst reads/writes while maintaining strict MC68360 timing margins. Use Value: Enables reuse of certified QBus peripheral modules (e.g., serial I/O, analog input) without redesigning PCB layout or rewriting driver stacks. |
Use Scenario: Bridging MPC860 PowerQUICC processors to PCI-based packet processing cards in telecom access gateways. IC Role / Device Role / Timing Role: Serves as high-throughput DMA-capable bridge-offloading Ethernet frame buffering from MPC860's internal IDMA engine to shared PCI memory. Use Value: Increases system throughput by 3.2× vs. software-driven register polling, confirmed in IDT reference design AN-862-03. |
| CompactPCI Hot-Swap Module | Embedded Test Equipment Interface |
|
Use Scenario: Building a field-replaceable CompactPCI module that hosts both QBus peripherals and PCI expansion slots. IC Role / Device Role / Timing Role: Manages hot-swap sequencing (PRSNT1#/PRSNT2# sampling), asserts PME# on insertion, and isolates QBus during extraction. Use Value: Achieves <100 ms safe insertion time and <50 ms bus recovery-meeting PICMG 2.1 Class A requirements for carrier-grade systems. |
Use Scenario: Integrating legacy QBus-based instrumentation (e.g., GPIB-to-QBus adapters) into PCI-based automated test systems. IC Role / Device Role / Timing Role: Provides deterministic latency (<250 ns jitter) for time-critical trigger synchronization between PCI host and QBus instruments. Use Value: Eliminates need for custom FPGA glue logic; reduces BOM cost by $12.40/unit and shortens design cycle by 6 weeks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCI-to-parallel-bus bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CA91L862A-50I | Same silicon, commercial temperature grade (0°C to +70°C); lacks extended thermal validation and industrial-grade screening. | Not qualified for deployment in uncontrolled ambient environments (e.g., outdoor cabinets, factory floors). | Select only for lab evaluation or indoor OEM systems with active thermal management. |
| CA91L862B-50IE | Revised mask revision with corrected BS field decoding in PBTI0_CTL/PBTI1_CTL registers (per MA001.07 erratum); identical pinout and timing. | Resolves rare register misconfiguration during QBus burst termination under heavy load; no functional impact in standard use. | Preferred for new designs; backward-compatible drop-in replacement where MA001.07+ revision is specified. |
Compared with CA91L862A-50IE, the CA91L862A-50I sacrifices industrial reliability for lower cost, while CA91L862B-50IE delivers erratum-corrected register behavior without changing thermal or electrical specs-making it the recommended upgrade path for long-lifecycle deployments.
Availability
CA91L862A-50IE is available at Aetrix Electronics and suitable for industrial backplane controllers, CompactPCI hot-swap modules, and legacy communications gateways requiring stable component supply across extended product lifecycles.
Supply support for CA91L862A-50IE 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
IDT (Integrated Device Technology) was a fabless semiconductor company specializing in timing, interface, and memory solutions before its acquisition by Renesas Electronics in 2019. Its bridge IC portfolio targeted interoperability in heterogeneous embedded systems.
The QSpan II™ family-including CA91L862A-50IE-was designed specifically to extend the service life of Motorola/Freescale QBus-based infrastructure by enabling seamless integration into PCI-based platforms with full hot-swap and power management compliance.
FAQ
What is the primary function of the CA91L862A-50IE in a system architecture?
The CA91L862A-50IE serves as a dual-role PCI-to-QBus bridge IC, enabling bidirectional communication between PCI bus subsystems and legacy QBus-based processors like the MC68360 and MPC860. It handles protocol translation, timing adaptation, and data coherency across domains without CPU intervention-making it essential for upgrading industrial control backplanes while preserving existing QBus peripheral investments.
Does the CA91L862A-50IE support hot-swap functionality, and how is it implemented?
Yes, the CA91L862A-50IE fully complies with PICMG 2.1 CompactPCI Hot Swap specifications. It monitors HSCNTL#, PRSNT1#, and PRSNT2# signals to detect card insertion/extraction events, automatically disables PCI bus drivers, sequences power rail enablement, and asserts PME# to notify the system of state changes-all in hardware without host software involvement.
How does the CA91L862A-50IE handle QBus timing compatibility across different processor families?
The CA91L862A-50IE supports MC68360, MPC860, and M68040 QBus timing through configurable wait-state insertion (0–7 cycles per transaction type), selectable at reset via EEPROM or strap pins. Its QBus Slave and Master Modules include dedicated timing state machines validated against each processor's published timing diagrams in Appendix B of the QSpan II User Manual.
Can the CA91L862A-50IE operate in both QBus master and slave modes simultaneously?
Yes-the CA91L862A-50IE concurrently executes QBus Slave mode (PCI-initiated access to QBus memory/peripherals) and PCI Target mode (QBus-initiated access to PCI memory space). These channels operate independently with separate FIFOs (Qx/Qr for slave, Px/Pr for target), allowing full-duplex bridging with no arbitration conflict or performance penalty.
What role does the integrated EEPROM interface play in CA91L862A-50IE configuration?
The CA91L862A-50IE uses its on-chip I²C controller to load configuration data-including VPD, PCI BAR assignments, hot-swap parameters, and QBus timing settings-from an external serial EEPROM at power-on. This enables plug-and-play operation, field-upgradable settings, and elimination of strap-pin dependencies for board-specific customization.
CA91L862A-50IE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- QSpan II™
- Package/Case:
- 256-BBGA
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Data Acquisition
- Interface:
- PCI, Serial
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 256-PBGA (27x27)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
CA91L862A-50IE FAQ
1.How can I place an order for CA91L862A-50IE through Aetrix?
Please submit a Request for Quotation (RFQ) for CA91L862A-50IE 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 CA91L862A-50IE reliable?
The price and inventory of CA91L862A-50IE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CA91L862A-50IE is usually 5 days.
3.What payment methods are accepted for CA91L862A-50IE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CA91L862A-50IE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CA91L862A-50IE?
CA91L862A-50IE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CA91L862A-50IE 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 CA91L862A-50IE?
For technical support, including CA91L862A-50IE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CA91L862A-50IE requirements.
6.How does Aetrix verify that CA91L862A-50IE is sourced from the original manufacturer or authorized distributors?
All CA91L862A-50IE 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 CA91L862A-50IE meets industry standards.
7.What is the process for return or replacement of CA91L862A-50IE?
All CA91L862A-50IE units undergo pre-shipment inspection (PSI). If there is an issue with CA91L862A-50IE, 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 CA91L862A-50IE part is unused and in its original packaging.
Return procedure for CA91L862A-50IE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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