DALLAS A PCI-to-DSP bridge device from Texas Instruments Inc. connects multiple TI DSPs to the PCI bus with no additional glue logic. The PCI2040 PCI-to-DSP bridge IC interfaces the PCI bus to the host port interface for up to four TI TMS320C54x and/or TMS320C62x DSPs.
Rather than implement an FPGA or ASIC, the device provides a fast, high-bandwidth data-transmission path between the PCI local bus and a DSP subsystem, simplifying the system designer's task and bringing DSP designs to market faster. "A wide variety of applications are moving to take advantage of the PCI local bus and its derivatives like Compact PCI (CPCI)," said Neela Patel, TI's marketing program manager for PCIbus products.
The PCI2040 fully complies with the latest PCI Local Bus Specification 2.2 and the Compact PCI Hot Swap specification. This specification, which defines a process for inserting and removing a printed-circuit board without affecting a running system, enables the PCI2040 to be used in a variety of embedded systems where the benefits of hot swap can be utilized.
Moreover, the PCI2040 is fully compliant with the latest PCI Bus Power Management Interface Specification. Thus, it is suited for mobile and power-sensitive applications. The power-saving device reduces power consumption with its low-power 3.3-V core logic. At the same time, it can be used with legacy systems since it is PCI-compliant with 3.3- or 5-V signaling requirements.
The PCI2040's serial interface to read-only memory (ROM) eases the configuration of the device by enabling automatic loading of important information such as subsystem ID and subsystem vendor ID. Also, it automatically configures several DSP-specific registers such as the number of DSPs present in the system and the interface width of the connected DSPs. The PCI2040 also features an interface to a 16-bit general-purpose bus, which can be used to connect the device to an IEEE 1149.1 boundary-scan test bus (JTAG) controller or to other devices on the printed-circuit board.
The PCI2040 is just one device among several PCI-DSP bridging solutions that TI will be bringing to market to support a variety of TI DSPs. Further, the PCI-DSP bridges are part of a complete PCI bus-bridging strategy with devices that span a variety of markets. These products include PCI-PCI bridges for embedded systems, PCI-DSP controllers for DSP applications and advanced PCI bridge products for mobile and docking-station applications.
The PCI2040 comes in a choice of surface-mount packages. Users can choose a 144-pin thin quad flat pack or TI's 12-x-12-mm Microstar BGA package, which saves board space. Samples of the PCI-2040 are available now from TI, with production planned for later in the second quarter. Suggested resale pricing in lots of 1,000 is planned to be less than $10.
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EETInfo No. 627