InsideShowcase (Volume 24) is available in HTML and PDF format. - 316KB
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PCI1220/1250A: Industry-leading CardBus solutions for tomorrow’s applicationsProduct Features
PCI1220 Key Features:
Portable computers will now be able to support the most demanding multimedia applications with the industry-leading performance of the PCI1250A and PCI1220 PCI-to-CardBus controllers. These devices use Texas Instruments’ high-performance pipelined FIFO architecture, enabling data throughput up to 132 Mbytes/sec, which is the theoretical maximum for a 32-bit, 33-MHz peripheral component interconnect (PCI) bus. The controllers interface the PCI bus, a VGA controller for Zoomed video equipped systems, and two PC Card 16 or CardBus slots. These slots support insertable PC cards that access peripheral devices such as modems and local area networks (LANs). Zoomed Video allows full-motion video signals to be routed directly to the video controller, bypassing the PCI bus and freeing it up for use by the CPU and other devices. The PCI1250A is the industry’s most highly integrated PCI-to-Cardbus controller, with features such as programmable IRQ pin assignments, four additional general purpose I/O pins, and internal zoom video buffers on chip. The PCI1250A also offers enhanced burst mode data transfers and advanced power management to enable the highest performance you can receive from your PCI bus while consuming less power. The PCI1250A includes several capabilities that simplify the task of designing a CardBus/PC Card controller into a wide range of system platforms. One such feature is programmable pin assignments for interrupts; with this technology, designers can program the routing of a PC’s standard 15 interrupt signals so that they can be output to any of several pins on the PCI1250 controller. In addition, system designers can multiplex or combine more than one type of interrupt onto selected pins, increasing the design flexibility and options available to system engineers. The PCI1220 features are identical to the PCI1250A without the internal zoom video buffers. These devices were specially designed to meet the needs of systems complying with the Microsoft® PC97 hardware design guidelines. The PCI1250A and PCI1220 support PC97s Advanced Configuration and Power Interface (ACPI) requirement for complete systems. They also allow Windows® operating systems to conserve battery life by powering down the CardBus controller when it is not in use and shutting down socket circuitry when a CardBus or PC Card is not inserted. Both devices will function in either 3.3 V or 5 V bus systems. The PCI1250A is available in a 256-pin BGA package and the PCI1220 is available in a 208-pin TQFP package.
Vol 24 November, 1997 |
