Texas Instruments XIO2213BZAJ

Overview

XIO2213BZAJ from Texas Instruments is a PCI Express-to-IEEE 1394b OHCI bridge IC with integrated 3-port PHY, supporting PCIe Gen1 x1 link (2.5 Gbps), OHCI 1.1 compliance, and 1394b S400/S800 operation. It serves as a host-side bridge in desktop add-in cards and embedded systems requiring legacy FireWire connectivity over modern PCIe infrastructure.

For engineers reviewing the XIO2213BZAJ datasheet, XIO2213BZAJ pinout, XIO2213BZAJ application, or XIO2213BZAJ equivalent, key selection considerations include PCIe-to-1394b protocol translation fidelity, integrated PHY power class configuration, OHCI register-level compatibility with legacy drivers, and TI's proprietary GPIO and serial-bus EEPROM interface support.

Technical Context

The XIO2213BZAJ implements a full PCIe endpoint with configurable link training, Advanced Error Reporting (AER), MSI interrupt delivery, and PCIe power management (L0s/L1). Its OHCI controller supports asynchronous and isochronous DMA, cycle timer synchronization, and IEEE 1394b physical layer arbitration across three ports.

PHY-level features include programmable power class (Class A/B/C), crystal oscillator selection (24.576 MHz or 49.152 MHz), bus reset handling, and differential signaling compliant with 1394b S400/S800 electrical specs. The device maps OHCI registers into PCIe memory space and provides TI-proprietary extensions for DV/MPEG2 timestamping and isochronous receive enhancements.

Key Specifications

Pinout & Package

The XIO2213BZAJ is housed in a 256-pin ZAJ (Fine-Pitch Ball Grid Array) package with 1.0 mm ball pitch, designed for high-density PCB layouts and thermal dissipation in add-in card applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe-to-1394b bridge applications.

Compared with XIO2213AZAJ and FW322, the XIO2213BZAJ delivers native PCIe Gen1 integration, advanced error reporting, and TI-proprietary DV timestamping-making it the only option supporting modern host platforms while maintaining full OHCI 1.1 driver compatibility and multi-port 1394b S800 operation.

Availability

XIO2213BZAJ is available at Aetrix Electronics and suitable for professional audio capture, digital video acquisition, industrial machine vision, and legacy test equipment interface applications requiring stable component supply and long-term obsolescence planning.

Supply support for XIO2213BZAJ 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 specializing in analog, embedded processing, and connectivity solutions, with leadership in interface, timing, and signal chain technologies.

The XIO2213BZAJ belongs to TI's PCI Express bridge product line, engineered specifically to extend legacy IEEE 1394b infrastructure into PCIe-based computing platforms while preserving driver and protocol compatibility.

FAQ

What is the primary function of the XIO2213BZAJ?

The XIO2213BZAJ is a PCI Express-to-IEEE 1394b OHCI bridge IC with integrated 3-port PHY. It enables PCIe-based host systems to communicate with legacy 1394b (FireWire) peripherals by translating PCIe transactions into OHCI-compliant 1394b protocol operations. The XIO2213BZAJ handles both asynchronous and isochronous data transfers, supports S100–S800 speeds, and maintains full OHCI 1.1 register compatibility for driver interoperability.

Does the XIO2213BZAJ support PCIe Gen2 or higher?

No, the XIO2213BZAJ supports only PCIe Gen1 at x1 lane width (2.5 Gbps per direction). Its link training, transaction layer, and physical layer logic are designed exclusively for Gen1 compliance, as confirmed in the SCPS210F datasheet sections 3.3 and 4.49–4.52. The XIO2213BZAJ does not negotiate Gen2 or Gen3 link speeds, and attempting to force higher rates results in link training failure.

How many 1394b ports does the XIO2213BZAJ provide, and are they electrically isolated?

The XIO2213BZAJ integrates three independent 1394b PHY ports (A, B, C), each with dedicated differential TX/RX pairs and programmable power class. These ports share internal logic but are electrically isolated at the PHY level-each supports separate cable detection, bus reset arbitration, and S400/S800 negotiation. The XIO2213BZAJ datasheet confirms this in sections 10.2.1 and Figure 10–1.

What role does the two-wire serial-bus interface play in XIO2213BZAJ operation?

The two-wire serial-bus interface (SCL/SDA) on the XIO2213BZAJ implements an I²C-compatible bus used primarily to load configuration data from an external EEPROM during power-up. This includes PHY power class settings, GPIO defaults, and OHCI subsystem identification values. The XIO2213BZAJ also allows runtime access to connected I²C peripherals via its Serial-Bus Data and Control Registers (sections 3.5 and 4.56–4.59).

Is the XIO2213BZAJ compatible with standard OHCI drivers in Windows and Linux?

Yes, the XIO2213BZAJ implements full OHCI 1.1 register-level compatibility, including all mandatory CSR, IRM, and context descriptor structures defined in the OHCI specification. Both Windows (via inbox 1394bus.sys) and Linux (drivers/firewire/ohci.ko) recognize the XIO2213BZAJ as a standard OHCI host controller. Driver compatibility is verified in TI's application note SPRAAL7 and confirmed by Microsoft WHQL certification records for XIO2213BZAJ-based add-in cards.