1394 High Speed Serial Bus

Link Layer Devices

MPEG2Lynx - TSB12LV41
DVLynx - TSB12LV42
GPLynx - TSB12LV31
GP2Lynx - TSB12LV32
PCILynx2 - TSB12LV21B
PCILynx - TSB12LV21A
OHCI-Lynx - TSB12LV22
TSB12LV01
TSB12C01A

Physical Layer Devices

TSB21LV03A
TSB11C01
TSB11LV01
TSB14C01A
TSB41LV0x
1394 Designer's Kits

1394 Serial Bus Devices

PCILynx - TSB12LV21A

Product Description

The TSB12LV21A provides a high-performance IEEE 1394-1995 interface with the capability to transfer data between the 1394 PHY/LINK interface, the PCI bus interface, and external devices connected to the local bus interface. The 1394 PHY/LINK interface provides the connection to the 1394 physical layer device and is supported by the on-board Link Layer Controller (LLC). The LLC provides the control for transmitting and receiving 1394 packet data between the FIFO and PHY/LINK interface at rates of 100, 200, and 400 Mbps. The LLC also provides the capability to receive status from the physical layer device and to access the physical layer control and status registers by the application software.

An internal 1K-byte memory is provided that can be configured as multiple variable-size FIFOs and eliminates the need for external FIFOs. Separate FIFOs can be user configured to support 1394 receive, asynchronous transmit, and isochronous transmit transfer operations.

The PCI interface supports 32-bit burst transfers up to 33MHz and is capable of operating as both master and target devices. Configuration registers can be loaded from an external serial EEPROM, allowing board and system designers to assign their own unique identification codes. An autoboot mode allows data-moving systems (such as docking stations) to be designed to operate on the PCI bus without the need for a host CPU.

The DMA controller uses packet control list (PCL) data structures to control the transfer of data and allow the DMA to operate without host CPU intervention. These PCLs can reside in PCI memory or in memory that is connected to the local bus port. The PCLs implement an instruction set that allows linking, conditional branching, 1394 data transfer control, auxiliary support commands, and status reporting. Five DMA channels are provided to accommodate programmable data types. PCLs can be chained together to form a channel control program that can be developed to support each DMA channel. Data can be stored in either big endian or little endian format eliminating the need for the host CPU to perform byte swapping. Data can be transferred to either 4-byte aligned locations to provide the highest performance or to nonaligned locations to provide the best memory use.

Target Applications

  • Host Adapter Cards

    The TSB12LV21A provides the easiest way to add 1394 connections to a PC or Workstation platform. Designer Kits are available from TI that can be used as a starting point for adapter card design.

  • Motherboards

    The TSB12LV21A integrates the functionality of a DMA engine, PCI interface, and Zoom Video (ZV) port onto one chip, enabling a motherboard manufacturer to add 1394 connections without taking up valuable motherboard real-estate.