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TSB12LV22 Datasheet(PDF) 7 Page - Texas Instruments |
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TSB12LV22 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 45 page TSB12LV22 OHCI-Lynx PCI-BASED IEEE 1394 HOST CONTROLLER SLLS290 – JULY 1998 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 OHCI-Lynx controller programming model (continued) A bit description table is typically included that indicates bit field names, a detailed field description, and field access tags. The field access tags are described in Table 2. Table 2. Bit Field Access Tag Descriptions ACCESS TAG NAME MEANING r read Field may be read by software. w write Field may be written by software to any value. s set Field may be set by a write of one. Writes of zero have no effect. c clear Field may be cleared by a write of one. Writes of zero have no effect. u update Field may be autonomously updated by the OHCI-Lynx. PCI configuration registers The OHCI-Lynx configuration header is compliant with the PCI Specification as a standard header.Table 3 illustrates the PCI configuration header which includes both the predefined portion of the configuration space and the user definable registers. The registers that are labeled Reserved are read only returning zero when read, and are not applicable to the OHCI-Lynx design, or have been reserved by the PCI specification for future use. Table 3. PCI Configuration Register Map REGISTER NAME OFFSET Device ID Vendor ID 00h Status Command 04h Class Code Revision ID 08h BIST Header Type Latency Timer Cache Line Size 0Ch Open HCI Registers Base Address 10h TI Extension Registers Base Address 14h Reserved 18h Reserved 1Ch Reserved 20h Reserved 24h Reserved 28h Subsystem ID Subsystem Vendor ID 2Ch Reserved 30h Reserved Capabilites Pointer 34h Reserved 38h Max Latency Min Grant Interrupt Pin Interrupt Line 3Ch PCI OHCI Control Register 40h Power Management Capabilities Next Item Pointer Capability ID 44h PM Data PMCSR_BSE Power Management CSR 48h Reserved 4C–F2h Link_Enhancements Register F4h Subsytem ID Alias Subsystem Vendor ID Alias F8h GPIO3 GPIO2 GPIO1 GPIO0 FCh |
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