Texas Instruments XIO2213AZAY

Overview

XIO2213AZAY from Texas Instruments is a PCI Express-to-IEEE 1394b OHCI bridge IC with integrated 3-port PHY, supporting S1600/S800/S400/S200 data rates and compliant with PCI Express Base Specification 1.0a and IEEE 1394b-2002. It implements full OHCI v1.1 functionality, provides MSI interrupt support, and operates at 1.8-V core and 3.3-V I/O supply voltages for host interface connectivity in legacy FireWire expansion systems.

For engineers reviewing the XIO2213AZAY datasheet, XIO2213AZAY pinout, XIO2213AZAY application, or XIO2213AZAY equivalent, key selection considerations include PCIe Gen1 x1 link compatibility, integrated 1394b PHY with auto-negotiation, OHCI register-level software compatibility with existing FireWire drivers, and TI's proprietary GPIO and serial-bus configuration interfaces.

Technical Context

The XIO2213AZAY bridges a single-lane PCI Express root port to a fully compliant IEEE 1394b OHCI controller with on-die 3-port PHY supporting cable arbitration, loop detection, and power-class programming. Its PCIe interface includes Advanced Error Reporting (AER), Message Signaled Interrupts (MSI), and configurable flow control credits.

Internally, it maps OHCI registers into memory space accessible via PCIe TLPs, supports VAUX-aware power management per IEEE 1394b, and integrates dual-voltage operation (1.8 V core / 3.3 V I/O) with independent power-up sequencing. The device exposes GPIOs and a two-wire serial bus for EEPROM-based configuration and PHY tuning.

Key Specifications

Pinout & Package

The XIO2213AZAY is housed in a 256-pin ZAY (Fine-Pitch Ball Grid Array, 17 mm × 17 mm, 1.0 mm pitch) package with 14 × 14 ball array and thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe-to-FireWire bridge applications.

Compared with TAS1020B and XIO2200AZQL, the XIO2213AZAY uniquely delivers PCIe-native integration, MSI interrupt efficiency, and full OHCI v1.1 compliance-making it the only option for new designs requiring scalable, low-latency FireWire connectivity in PCIe infrastructure.

Availability

XIO2213AZAY is available at Aetrix Electronics and suitable for FireWire expansion cards, industrial machine vision interfaces, medical imaging data acquisition systems, and digital video editing workstations requiring stable component supply and long-term obsolescence management.

Supply support for XIO2213AZAY 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The XIO2213AZAY belongs to TI's PCI Express Bridge product line, designed specifically to extend legacy high-speed serial interfaces-including IEEE 1394b-into modern PCIe-based computing platforms while preserving software and driver investment.

FAQ

What is the primary function of the XIO2213AZAY?

The XIO2213AZAY is a PCI Express-to-IEEE 1394b OHCI bridge IC with integrated 3-port PHY. Its primary function is to enable high-speed FireWire connectivity on PCIe-based systems by translating PCIe transactions into 1394b link-layer operations while maintaining full OHCI v1.1 register compatibility. The XIO2213AZAY supports S1600/S800/S400/S200 data rates and implements VAUX-aware power management for hot-plug and suspend/resume functionality.

Does the XIO2213AZAY require an external 1394b PHY?

No, the XIO2213AZAY does not require an external 1394b PHY. It integrates a fully compliant IEEE 1394b-2002 3-port PHY with auto-negotiation, loop detection, cable arbitration, and power-class programming. This on-die PHY eliminates the need for discrete PHY components, reduces PCB area, and simplifies signal integrity design for all three 1394b ports.

Is the XIO2213AZAY compatible with standard OHCI drivers?

Yes, the XIO2213AZAY implements the complete OHCI v1.1 register set and DMA engine specification, ensuring binary compatibility with existing Windows, Linux, and macOS FireWire drivers. Its memory-mapped OHCI register space is accessed via PCIe TLPs, and no driver modification is required-making the XIO2213AZAY a drop-in upgrade path from legacy PCI-based OHCI controllers like the XIO2200A.

What power supply requirements does the XIO2213AZAY have?

The XIO2213AZAY requires three independent supplies: 1.8 V for the core logic (VDD), 3.3 V for I/O buffers (VDDIO), and VAUX (1.8–3.3 V) for auxiliary power during suspend states. Power-up sequencing must follow TI's specified order: VAUX first, then VDD, then VDDIO. The XIO2213AZAY supports VAUX-aware power management, enabling wake-on-FireWire and low-power retention modes.

How is configuration handled on the XIO2213AZAY?

Configuration of the XIO2213AZAY is performed via its two-wire serial bus (I²C-compatible) interface, which connects to an external EEPROM. During power-up, the device reads vendor ID, subsystem ID, PHY tuning parameters, GPIO defaults, and other settings from this EEPROM. Additionally, TI proprietary registers-including GPIO control, serial-bus slave address, and PHY diagnostic registers-are accessible through memory-mapped space for runtime reconfiguration.