PCI9056-BA66BI

Specialized Overview

The PCI9056-BA66BI is a 32-bit, 66MHz PCI Bus Mastering I/O Accelerator designed for Motorola PowerQUICC and generic local bus applications. It operates with a 2.5V core voltage and supports 3.3V I/O with 5V tolerance. The device features two independent DMA channels supporting block and scatter/gather transfers, alongside Direct Master and Direct Slave modes. It utilizes Data Pipe Architecture to achieve zero wait state bursts up to 264 MB/s on both PCI and local buses. The component is housed in a 256-ball PBGA package measuring 17 x 17 mm with a 1.00 mm pitch.

Specialized Feature Summary

• Supports Motorola PowerQUICC M mode and generic C/J mode local bus interfaces
• Integrated PICMG 2.1 r2.0 Hot Swap Silicon capabilities including bias voltage support
• Includes an I2O messaging unit with eight mailbox and two doorbell registers
• Features an internal PCI arbiter capable of supporting seven external masters

Specialized Applications

• Motorola MPC 850/860 based PowerQUICC designs for datacom and telecom
• CompactPCI adapters for industrial, telecom, and networking systems
• High-performance communications, networking, disk control, and RAID adapters
• I/O intensive embedded host designs such as network switches and set-top boxes

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product status documentation. Confirm that the package dimensions and pinout match the 256-ball PBGA specification. Ensure compatibility with the required local bus mode (M, C, or J) for the target processor interface. Check for lead-free variants if environmental compliance is mandatory for the assembly process.

Specialized Selection Notes

Select this component when interfacing with Motorola PowerQUICC processors requiring direct connection without complex logic. Choose the PCI9056-BA66BI for designs needing 66MHz PCI performance and integrated hot-swap support. Consider the register compatibility with the PCI9054 if migrating existing software drivers. Verify that the 3.3V I/O and 5V tolerant inputs align with the system's voltage levels.

Specialized Part Context

The PCI9056 serves as a high-performance bridge between PCI buses and various local bus architectures. It is part of the PLX Technology family of I/O accelerators, offering backward compatibility with the PCI9054 while adding enhancements like 66MHz operation and hot-swap silicon. This positioning makes it suitable for evolving embedded systems requiring increased bandwidth and flexible connectivity options.

Specialized Replacement Considerations

The PCI9054 is register compatible and serves as a functional predecessor. Designers migrating from the PCI9054 can utilize existing software drivers with minimal modification due to the backward-compatible register set.