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USB3813I-1080XY 参数 Datasheet PDF下载

USB3813I-1080XY图片预览
型号: USB3813I-1080XY
PDF下载: 下载PDF文件 查看货源
内容描述: USB 2.0高速3端口集线器控制器经过优化,用于便携式应用 [USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications]
分类和应用: 控制器便携式
文件页数/大小: 68 页 / 882 K
品牌: SMSC [ SMSC CORPORATION ]
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USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications  
Datasheet  
Table 3.1 Ball Descriptions (continued)  
NUM  
BALLS  
BUFFER  
TYPE  
NAME  
SYMBOL  
DESCRIPTION  
Reference  
Clock Select  
1 Input  
REFSEL1  
IS  
This signal, combined with REFSEL0, selects the  
reference clock input frequency. The reference  
select input must be set to correspond to the  
frequency applied to the REFCLK input. Refer to  
Section 8.4, "Reference Clock," on page 54 for  
additional information.  
1
SystemReset  
Input  
RESET_N  
I_RST  
This active-low signal allows external hardware to  
reset the device.  
Note:  
The active-low pulse must be at least  
5us wide. Refer to Section 8.3.2,  
"External Chip Reset (RESET_N)," on  
page 53 for additional information.  
1
1
External USB  
Transceiver  
Bias Resistor  
RBIAS  
AI  
IS  
A 12.0kΩ (+/- 1%) resistor is attached from  
ground to this pin to set the transceiver’s internal  
bias settings.  
Hub Connect  
Input  
HUB_CONN  
This signal is used to control the hub  
communication stage. The device will transition  
to the hub communications stage when this pin is  
asserted high. Two methods of use may be used:  
Tie to +3.3V: The hub will automatically transition  
to the communications stage when configuration  
is complete.  
1
Transition from low to high: The hub will  
transition to the communications stage after  
configuration is complete and this signal  
transitions from low to high.  
Refer to Section 8.5, "Hub Connect  
(HUB_CONN)," on page 55 for additional  
information.  
Charge  
Detect 0  
Output  
CHRGDET0  
CHRGDET1  
O8  
O8  
This signal, in conjunction with CHRGDET1, can  
be configured to communicate information that  
can affect the level of current that the system  
may draw from the upstream USB VBUS wire.  
Refer to Section 8.1.1.1, "Charger Detection  
(CHRGDET[1:0])," on page 50 for additional  
information.  
1
1
Charge  
Detect 1  
Output  
This signal, in conjunction with CHRGDET0, can  
be configured to communicate information that  
can affect the level of current that the system  
may draw from the upstream USB VBUS wire.  
Refer to Section 8.1.1.1, "Charger Detection  
(CHRGDET[1:0])," on page 50 for additional  
information.  
SMSC USB3813  
13  
Revision 1.0 (06-17-13)  
DATASHEET