Datenblatt-Suchmaschine für elektronische Bauteile |
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USS344S-DB Datenblatt(PDF) 7 Page - Agere Systems |
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USS344S-DB Datenblatt(HTML) 7 Page - Agere Systems |
7 / 54 page Agere Systems Inc. 7 Advance Data Sheet, Rev. 9 June 2001 Four-Host PCI-to-USB OpenHCI Host Controller USS-344 QuadraBus Pin Information (continued) Table 3. USB Port Signals (continued) * An N following the symbol names indicates active-low for the USS-344. Table 4. Legacy Support Signals * An N following the symbol names indicates active-low for the USS-344. Table 5. Chip Test Signals * An N following the symbol names indicates active-low for the USS-344. Pin Symbol* Type Description 77 PWRFLT0N Input USB Port 0 Overcurrent (Active-Low). 79 PWRFLT1N Input USB Port 1 Overcurrent (Active-Low). 102 PWRFLT2N Input USB Port 2 Overcurrent (Active-Low). 104 PWRFLT3N Input USB Port 3 Overcurrent (Active-Low). 81 CLK48STOP Bidir USB Clock Stop (Optional). Used to stop external 48 MHz clock in PCI power management state D3. 87, 93, 99 VDDTPower USB Transceiver VDD (3.3 V). 88, 94, 100 VSSTPower USB Transceiver VSS. 86 RREF Input USB 2.0 1 k Ω Precision Resistor Connection. Hi-Z if implementation does not expect upgrade to USB 2.0. 85 VDDAPower USB 2.0 Analog Power. Connect to VDD if implementa- tion does not expect upgrade to USB 2.0. 82 VSSAPower USB 2.0 Analog Power. Connect to VSS if implementa- tion does not expect upgrade to USB 2.0. 84 XHI Power USB 2.0 Crystal Oscillator XHI Connection. Hi-Z if implementation does not expect upgrade to USB 2.0. 83 XLO/CLK48 Power/Input USB 2.0 Crystal Oscillator XHI Connection/USB 1.X CLK 48 MHz Input. Pin Symbol* Type Description 68 KIRQ1I Input Legacy Keyboard Controller Interrupt (IRQ1 Input from Keyboard Controller). 67 MIRQ12I Input Legacy Mouse Controller Interrupt (IRQ12 Input from Mouse Controller). 69 A20I Input Legacy Gate A20 Input. 70 A20MN Output/Open Drain Legacy Gate A20 Output (to Memory Controller). 71 IRQ1 Output/Open Drain System Keyboard Interrupt (Active-High). 72 IRQ12 Output/Open Drain System Mouse Interrupt (Active-High). 75 SMIN Output/Open Drain System Management Interrupt (Active-Low). Pin Symbol* Type Description 61 TEST0 Input Chip Test Signal. Refer to Test Mode Connection Instructions section for usage information. 62 TEST1 Input Chip Test Signal. Refer to Test Mode Connection Instructions section for usage information. 63 TEST2 Input Chip Test Signal. Refer to Test Mode Connection Instructions section for usage information. 64 TEST3 Input Chip Test Signal. Refer to section Test Mode Connection Instructions for usage information. |
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