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PCI1251BGJG Datasheet(PDF) 3 Page - Texas Instruments |
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PCI1251BGJG Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 126 page  PCI1251B GFN/GJG PC CARD CONTROLLER SCPS043A – OCTOBER 1998 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 system block diagram A simplified system block diagram using the PCI1251B is provided below. The zoomed video (ZV) capability can be used to route the ZV data directly to the VGA controller. The PCI interface includes all address/data and control signals for PCI protocol. The 68-pin PC Card interface includes all address/data and control signals for CardBus and 16-bit (R2) protocols. When zoomed video (ZV) is enabled (in 16-bit PC Card mode), 23 of the 68 signals are redefined to support the ZV protocol. The interrupt interface includes terminals for parallel PCI, parallel ISA, and serialized PCI and ISA signaling. The ring indicate terminal is included in the interrupt interface because its function is to perform system wake up on incoming PC Card modem rings. Other miscellaneous system interface terminals available on the PCI1251B include: D Programmable general purpose multifunction terminals D SUSPEND, RI_OUT/PME (power management control signal) D SPKROUT PCI Bus PCI1251B Activity LED’s South Bridge IRQSER† Embedded Controller DMA PME 68 23 for ZV (See Note) PC Card Socket A TPS2206 Power Switch 3 PC Card Socket B VGA Controller Zoomed Video 19 Video 4 Audio CLKRUN †Interrupt Routing Options: 1) Serialized, including PCI and ISA 2) Serialized ISA and parallel PCI 3) Parallel PCI and parallel ISA 4) Parallel PCI interrupts only ZV Enable 23 for ZV 68 NOTE: The PC Card interface is 68 pins for CardBus and 16-bit PC Cards. In zoomed-video mode, 23 pins are used for routing the zoomed video signals to the VGA controller. |
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