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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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USS-820D Datenblatt(PDF) 8 Page - Agere Systems |
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USS-820D Datenblatt(HTML) 8 Page - Agere Systems |
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8 / 58 page  8 Agere Systems Inc. Data Sheet, Rev. 4 June 2001 USB Device Controller USS-820D Pin Information (continued) Table 2. Pin Descriptions * Active-low signals within this document are indicated by an N following the symbol names. † Pins marked as NC must have no external connections, except where noted. 44-Pin MQFP (USS-820D) 48-Pin TQFP (USS-820TD) Symbol* Type Name/Description 12 VDDA P 3.3 V Power Supply for Analog PLL. 2 3 XTAL1 I Crystal/Clock Input. If the internal oscillator is used, this is the crystal input. If an external oscillator is used, this is the clock input. 3 4 XTAL2 O Crystal/Clock Output. If the internal oscillator is used, this is the crystal output. If an external oscillator is used, this output should be left unconnected. 45 VDDT P 3.3 V Power Supply for USB Transceiver. 5 6 DMNS I/O USB Differential Data Bus Minus. 6 7 DPLS I/O USB Differential Data Bus Plus. 78 VSST P Device Ground for USB Transceiver. 12, 11, 10, 9, 8 13, 12, 11, 10, 9 A[4:0] I Address Bus. This is the address bus for the controller to access the register set. 13 14 VSSX P Device Ground. For compatibility with USS-820 revision B, this pin can be connected to a controller address bit, as long as it is guaranteed to be equal to 0 during register accesses and meets all address pin timing requirements. 14, 20, 21, 22, 23, 24, 34, 40 15, 22, 23, 24, 25, 26, 37, 43 VSS0, VSS1, VSS2, VSSX P Device Ground. 15 16 DSA O Data Set Available. Indicates one or more receive data sets are valid, or one or more transmit data sets are empty (available). For compatibility with USS-820 revision B, this output is 3-stated if MCSR.BDFEAT = 0. 18 19 USBR O USB Reset Detected. Indicates a USB reset event has been detected on USB. This pin will remain asserted until the SSR.RESET register bit is cleared by firmware. For compatibility with USS-820 revision B, this output is 3- stated if MCSR.BDFEAT = 0. 16 1, 17, 20, 21, 27 NC† — No Connect. 17, 44 18, 47 VDD0, VDD1 P 3.3 V Power Supply. 19 48 DPPU O DPLS Pull-Up. Can be used to supply power to the DPLS 1.5 k Ω pull-up resistor to allow firmware to simulate a device physical disconnect. This pin is directly controlled by the DPEN register bit. 25 28 RWUPN I Remote Wake-Up (Active-Low). Device is initiating a remote wake-up from a suspend condition. This input is ignored if SCR register bit RWUPE = 0. 26 29 SUSPN O Suspend (Active-Low). USB suspend has been detected; chip has entered suspend (low power) mode. This pin is deasserted when a wake-up event is detected. |
Ähnliche Teilenummer - USS-820D |
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Ähnliche Beschreibung - USS-820D |
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