Texas Instruments PCI6412ZHK

Overview

PCI6412ZHK from Texas Instruments is a single-socket CardBus controller IC integrating IEEE 1394a-2000 OHCI two-port PHY/link-layer functionality, supporting 32-bit/33-MHz PCI bus interface and 16-bit CardBus socket control. It delivers full OHCI-compliant FireWire® connectivity with integrated power management, serial EEPROM I²C interface, and multi-function terminal routing for PC Card systems.

For engineers reviewing the PCI6412ZHK datasheet, PCI6412ZHK pinout, PCI6412ZHK application, or PCI6412ZHK equivalent, this device is selected for legacy PC Card-based FireWire expansion designs requiring integrated PCI-to-CardBus bridging, dual-port 1394 PHY/link control, and ACPI-compliant power sequencing in industrial and embedded notebook peripherals.

Technical Context

The PCI6412ZHK implements a dual-function PCI device: Function 0 handles CardBus socket control (ExCA-compatible), while Function 1 provides full OHCI 1394a-2000 link-layer and PHY management. It supports 48-MHz crystal input for 1394 timing and integrates an LDO voltage regulator for CardBus VCC generation.

It features programmable interrupt subsystems for both PCI and CardBus events, including card insertion/removal detection, power switch interface support, and SMI capability. The controller enables simultaneous operation of multiple PC Card functions - Flash Media, SD Host, Smart Card - via dedicated subsystem identification registers.

Key Specifications

Pinout & Package

PCI6412ZHK is housed in a 256-pin TQFP package (32 × 32 mm, 0.5-mm pitch) with thermal pad. Pin assignments are defined per Section 2.8 "Terminal Assignments" and Section 2.9 "Detailed Terminal Descriptions" of SCPS110.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CardBus + 1394 controller applications.

Compared with PCI6412GHK and PCI7412ZHK, the PCI6412ZHK offers optimal cost/performance balance for commercial-temperature FireWire expansion cards where 16-bit legacy PC Card support is unnecessary and ambient stays within 0°C–70°C.

Availability

PCI6412ZHK is available at Aetrix Electronics and suitable for FireWire expansion cards, industrial PC Card adapters, multi-function peripheral cards, and legacy notebook docking solutions requiring stable component supply and long-term obsolescence management.

Supply support for PCI6412ZHK 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 technologies, with decades of leadership in interface and controller ICs.

The PCI6412ZHK belongs to TI's PCIxx12 family of multifunction CardBus controllers, designed specifically to consolidate PCI-to-PC-Card bridging, IEEE 1394 OHCI control, and power management into a single IC for space-constrained mobile and industrial peripherals.

FAQ

What is the primary function of the PCI6412ZHK?

The PCI6412ZHK is a multifunction PCI-to-CardBus bridge IC that integrates a full IEEE 1394a-2000 OHCI dual-port PHY/link-layer controller. Its primary function is to enable FireWire connectivity via a standard PC Card slot while managing CardBus power, detection, and resource allocation under PCI host control. The PCI6412ZHK eliminates the need for discrete bridge, OHCI, and CardBus controller chips in legacy expansion card designs.

Does the PCI6412ZHK require an external crystal for 1394 operation?

Yes, the PCI6412ZHK requires a 48-MHz fundamental-mode crystal connected to its X1/X2 pins to generate precise timing for the IEEE 1394 PHY layer. This crystal is mandatory for compliant 100/200/400 Mbps FireWire operation; the PCI6412ZHK does not include an internal PLL capable of synthesizing the required 491.52 MHz PHY clock from lower-frequency sources.

How many PCI functions does the PCI6412ZHK implement?

The PCI6412ZHK implements five PCI functions: Function 0 (CardBus socket controller), Function 1 (OHCI 1394), Function 2 (Flash Media), Function 3 (SD Host), and Function 4 (Smart Card). Each function has its own configuration space and subsystem identification registers, allowing independent enumeration and driver binding in compliant operating systems.

Is the PCI6412ZHK pin-compatible with other devices in the PCIxx12 family?

Yes, all PCIxx12 family members-including PCI6412ZHK, PCI6412GHK, PCI7412ZHK, and PCI8412ZHK-share identical 256-pin TQFP packaging and pinout. This allows drop-in replacement across temperature grades and feature variants, provided firmware and driver support align with the specific functionality enabled in each variant.

What power management standards does the PCI6412ZHK support?

The PCI6412ZHK supports PCI Power Management Specification 1.1, ACPI 1.0b, and the CardBus Clock Run Protocol. It implements D0–D3hot power states, generates PME# on wake events (card insertion, 1394 bus reset), and coordinates suspend/resume across PCI, CardBus, and OHCI domains. The PCI6412ZHK's integrated LDO also enables controlled power ramping for CardBus VCC during state transitions.