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AMD-766AC Datasheet(PDF) 57 Page - Advanced Micro Devices |
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AMD-766AC Datasheet(HTML) 57 Page - Advanced Micro Devices |
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57 / 96 page  Preliminary Information 23167B – March 2001 AMD-766 TM Peripheral Bus Controller Data Sheet 57 5.7 USB Host Controller Memory-Mapped Registers 5.7.1 Summary For a complete description of these registers, see the OCHI 1.0a specification. Offset Register Offset Register 00-03h HcRevision 34-37h HcFmInterval 04-07h HcControl 38-3Bh HcFrameRemaining 08-0Bh HcCommandStatus 3C-3Fh HcFmNumber 0C-0Fh HcInterruptStatus 40-43h HcPeriodicStart 10-13h HcInterruptEnable 44-47h HcLSThreshold 14-17h HcInterruptDisable 48-4Bh HcRhDescriptorA 18-1Bh HcHCCA 4C-4Fh HcRhDescriptorB 1C-1Fh HcPeriodCurrentED 50-53h HcRhStatus 20-23h HcControlHeadED 54-57h HcRhPortStatus[1] 24-27h HcControlCurrentED 58-5Bh HcRhPortStatus[2] 28-2Bh HcBulkHeadED 5C-5Fh HcRhPortStatus[3] 2C-2Fh HcBulkCurrentED 60-63h HcRhPortStatus[4] 30-33h HcDoneHead 100h HceControl 104h HceInput 108h HceOutput 10Ch HceStatus 5.7.2 Implementation-Specific Items • HcRevision[7:0] is 10h to indicate that it conforms to OHCI 1.0. • HcRevision[8] is 1 to indicate that legacy keyboard & mouse emulation support is present. • HcFmInterval_FSLargestDataPacket resets to 0. • HcRhDescriptorA_NumberDownstreamPorts is hardwired to 4. • HcRhDescriptorA_NoPowerSwitching resets to 1. • HcRhDescriptorA_PowerSwitchingMode and HcRhDescriptorA_OverCurrentProtectionMode must not be set and reset to 0. • HcRhDescriptorA_PowerOnToPowerGoodTime resets to 1 (representing 2 ms), and can only hold the values 0 to 3 (0 to 6 ms). • HcRhDescriptorA_NoOverCurrentProtection resets to 0. • HcRhDescriptorB_DeviceRemovable resets to 0 and should be set by BIOS if non-removable devices are attached. • HcRhDescriptorB_PortPowerControlMask resets to 0 and should not be set. • Because power switching is not implemented, the set and clear power bits in HcRhStatus and HcRhPortStatus[1- 4] are not supported. • HceControl and HceStatus reset to 00h. • HceInput and HceOutput are not reset. • HcDoneHd[31:4] should not be modified. • HcFmInterval_FSLargestDataPacket is limited to 14 bits. Bit 15 is read-only 0. • HcFmNumber should not be modified. |
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