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USB2512B-AEZG 参数 Datasheet PDF下载

USB2512B-AEZG图片预览
型号: USB2512B-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  
TYPE  
SYMBOL  
DESCRIPTION  
SERIAL PORT INTERFACES  
SDA /  
I/OSD12  
Serial Data signal (SDA)  
Server Message Block Data signal (SMBDATA)  
Non-removable port strap option  
SMBDATA /  
NON_REM[1]  
If this strap is enabled by package and configuration settings (see Table 8.1),  
this pin will be sampled (in conjunction with LOCAL_PWR / SUSP_IND /  
NON_REM[0]) at RESET_N negation to determine if ports [7:1] contain  
permanently attached (non-removable) devices:  
NON_REM[1:0] = ‘00’, All ports are removable.  
NON_REM[1:0] = ‘01’, Port 1 is non-removable.  
NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable.  
NON_REM[1:0] = ‘11’, When available, ports 1 2 & 3 are non-removable.  
RESET Input  
RESET_N  
IS  
The system can reset the chip by driving this input low. The minimum active  
low pulse is 1 μs.  
SCL /  
I/OSD12  
Serial Clock (SCL)  
System Management Bus Clock (SMBCLK)  
SMBCLK /  
CFG_SEL[0]  
Configuration Select: The logic state of this multifunction pin is internally  
latched on the rising edge of RESET_N (RESET_N negation), and will  
determine the hub configuration method as described in Table 8.1, "Hub  
Configuration Options".  
HS_IND /  
I/O12  
Hi-Speed Upstream Port Indicator  
HS_IND: Hi-speed Indicator for upstream port connection speed.  
The active state of the LED will be determined as follows:  
CFG_SEL[1] = ‘0’,  
HS_IND is active high,  
CFG_SEL[1] = ‘1’,  
HS_IND is active low,  
‘Asserted’ = the hub is connected at HS  
‘Negated’ = the hub is connected at FS  
CFG_SEL[1]  
CFG_SEL[2]  
Configuration Programming Select  
CFG_SEL[1]: The logic state of this pin is internally latched on the rising edge  
of RESET_N (RESET_N negation), and will determine the hub configuration  
method as described in Table 8.1, "Hub Configuration Options".  
I
Configuration Programming Select  
The logic state of this pin is internally latched on the rising edge of RESET_N  
(RESET_N negation), and will determine the hub configuration method as  
described in Table 8.1, "Hub Configuration Options". When the CFG_SEL[2]  
pin is unavailable, then the logic is internally tied to ‘0’.  
SMSC USB251x  
25  
Revision 1.0 (3-11-09)  
DATASHEET  
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