Texas Instruments CS4210VJG

Overview

CS4210VJG from National Semiconductor is a PCI-based IEEE 1394 OHCI (Open Host Controller Interface) controller implementing the IEEE 1394 Link Layer per OHCI Specification v1.0, supporting 100/200/400 Mbit/s data transfer, with integrated DMA engines for asynchronous and isochronous traffic, and compatible with Geode CS4103 PHY devices. It targets PC, set-top box, thin client, and WebPAD™ systems requiring high-speed serial interconnect.

For engineers reviewing the CS4210VJG datasheet, CS4210VJG pinout, CS4210VJG application, or CS4210VJG equivalent, this page delivers verified technical context, exact pin functions, FIFO sizing, OHCI register architecture, and validated alternatives for IEEE 1394 host controller selection in embedded and consumer electronics designs.

Technical Context

The CS4210VJG integrates a full PCI bus mastering interface compliant with PCI Rev 2.1, operating at up to 33 MHz with 5V-tolerant I/O. Its DMA engine comprises four dedicated modules: ATDMA for asynchronous transmit, ITDMA for isochronous transmit, RDMA for receive processing, and a shared Transfer Engine handling descriptor movement and byte alignment.

It implements three clock domains: PCI (≤33 MHz), SCLK (49.152 MHz), and SCLK/2 (24.576 MHz). The link layer supports P1394a features including cycle start packet generation, CRC32, and physical request filtering, while the PHY-Link interface connects directly to Geode CS4103 or other IEEE 1394-1995/P1394a Draft 2.0 physical layer devices.

Key Specifications

Pinout & Package

CS4210VJG is housed in a 100-pin LQFP (Low-profile Quad Flat Pack) package with 0.5 mm pitch, designed for surface-mount assembly and thermal management in space-constrained consumer electronics enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar IEEE 1394 OHCI controller applications.

Compared with TSB41AB2 and FW322, CS4210VJG provides strict OHCI v1.0 register compatibility and optimized 100–400 Mbit/s performance in a compact LQFP package, making it ideal for cost-sensitive, space-constrained consumer platforms where proven driver support and minimal external components are critical.

Availability

CS4210VJG is available at Aetrix Electronics and suitable for PC add-in cards, set-top boxes, thin client terminals, and WebPAD™ systems requiring stable component supply and long-term industrial availability.

Supply support for CS4210VJG 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

National Semiconductor was a U.S.-based semiconductor company specializing in analog, interface, and mixed-signal ICs, acquired by Texas Instruments in 2011.

The Geode™ product line-including CS4210VJG-was engineered for highly integrated, low-power x86-compatible computing platforms targeting thin clients, set-top boxes, and portable multimedia devices.

FAQ

What is the primary function of the CS4210VJG in a system architecture?

The CS4210VJG serves as a PCI-based IEEE 1394 OHCI-compliant host controller, implementing the link layer protocol and managing DMA transfers for both asynchronous and isochronous traffic. It bridges the PCI bus to the IEEE 1394 physical layer, enabling high-speed serial communication up to 400 Mbit/s in PCs, set-top boxes, and WebPAD™ systems. Its role is strictly defined by the OHCI v1.0 specification and does not include PHY functionality.

Does the CS4210VJG integrate an IEEE 1394 physical layer?

No, the CS4210VJG does not integrate a physical layer. It provides a dedicated PHY-Link interface compatible with external IEEE 1394 PHY devices such as the Geode CS4103 or other P1394a-compliant transceivers. This separation allows flexible system design where link-layer and physical-layer functions are implemented in discrete ICs, reducing thermal coupling and enabling PHY upgrades independent of the controller.

What clock domains does the CS4210VJG operate in, and why are they significant?

The CS4210VJG operates in three distinct clock domains: PCI (≤33 MHz), SCLK (49.152 MHz), and SCLK/2 (24.576 MHz). This separation isolates high-speed link-layer timing from host bus timing, preventing jitter propagation from the PCI bus into isochronous audio/video streams. The SCLK domain precisely matches IEEE 1394 cycle timing requirements, ensuring deterministic packet transmission and reception essential for real-time AV applications.

How does the CS4210VJG handle isochronous data transfers compared to asynchronous ones?

The CS4210VJG dedicates separate DMA engines-ITDMA for isochronous transmit and RDMA for isochronous receive-with eight configurable contexts each. Isochronous transfers use fixed-bandwidth, time-division-multiplexed channels synchronized to the 49.152 MHz SCLK domain, guaranteeing latency and throughput. Asynchronous transfers use ATDMA with retry logic and acknowledgment handling, prioritizing reliability over timing determinism. Both paths feed into segregated FIFOs (2 KB TX, 4 KB RX) to prevent resource contention.

Is the CS4210VJG compatible with modern operating systems and drivers?

Yes, the CS4210VJG implements the full OHCI v1.0 register set and behavior, ensuring compatibility with standard IEEE 1394 host controller drivers in Windows (e.g., WinXP/Win7 1394 stack), Linux (ohci1394 kernel module), and legacy real-time OSes. Its register layout, interrupt semantics, and DMA descriptor format match the OHCI specification exactly, enabling plug-and-play support without custom driver development for CS4210VJG-based designs.