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USB2512BI-AEZG 参数 Datasheet PDF下载

USB2512BI-AEZG图片预览
型号: USB2512BI-AEZG
PDF下载: 下载PDF文件 查看货源
内容描述: USB 2.0高速集线器控制器 [USB 2.0 Hi-Speed Hub Controller]
分类和应用: 外围集成电路控制器PC时钟
文件页数/大小: 72 页 / 1689 K
品牌: SMSC [ SMSC CORPORATION ]
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USB 2.0 Hi-Speed Hub Controller  
Datasheet  
Table 5.2 USB251x Pin Descriptions (continued)  
BUFFER  
SYMBOL  
TYPE  
DESCRIPTION  
MISC  
XTALIN  
ICLKx  
Crystal Input  
24 MHz crystal  
This pin connects to either one terminal of the crystal or to an external  
24 MHz clock when a crystal is not used.  
CLKIN  
External Clock Input  
This pin connects to either one terminal of the crystal or to an external  
24 MHz clock when a crystal is not used.  
XTALOUT  
OCLKx  
Crystal Output  
24 MHz Crystal  
This is the other terminal of the crystal, or a no connect pin, when an external  
clock source is used to drive XTALIN/CLKIN.  
SUSP_IND /  
I/O  
Active/Suspend status LED  
Suspend Indicator: Indicates USB state of the hub.  
‘negated’ = Unconfigured, or configured and in USB Suspend  
‘asserted’ = the hub is configured, and is active (i.e., not in suspend)  
Local Power: Detects availability of local self-power source.  
LOCAL_PWR /  
NON_REM[0]  
Low = Self/local power source is NOT available (i.e., the hub gets all power  
from Upstream USB VBus).  
High = Self/local power source is available.  
NON_REM[0] Strap Option:  
If this strap is enabled by package and configuration settings (see Table 8.1,  
"Hub Configuration Options"), this pin will be sampled (in conjunction with  
NON_REM[1]) at RESET_N negation to determine if ports [x:1] contain  
permanently attached (non-removable) devices. Also, the active state of the  
LED will be determined as follows:  
NON_REM[1:0] = ‘00’, All ports are removable, and the LED is active high  
NON_REM[1:0] = ‘01’, Port 1 is non-removable, and the LED is active low  
NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable, and the LED is active  
high  
NON_REM[1:0] = ‘11’, When available, ports 1, 2 & 3 are non-removable, and  
the LED is active low  
TEST  
IPD  
TEST pin  
User must treat as a no connect pin or connect to ground. No trace or signal  
should be routed or attached to this pin.  
Revision 1.0 (3-11-09)  
26  
SMSC USB251x  
DATASHEET