欢迎访问ic37.com |
会员登录 免费注册
发布采购

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 ]
 浏览型号USB2512B-AEZG的Datasheet PDF文件第34页浏览型号USB2512B-AEZG的Datasheet PDF文件第35页浏览型号USB2512B-AEZG的Datasheet PDF文件第36页浏览型号USB2512B-AEZG的Datasheet PDF文件第37页浏览型号USB2512B-AEZG的Datasheet PDF文件第39页浏览型号USB2512B-AEZG的Datasheet PDF文件第40页浏览型号USB2512B-AEZG的Datasheet PDF文件第41页浏览型号USB2512B-AEZG的Datasheet PDF文件第42页  
USB 2.0 Hi-Speed Hub Controller  
Datasheet  
8.2.1.7  
Register 06h: CONFIG_BYTE_1  
BIT NAME  
BIT  
NUMBER  
DESCRIPTION  
7
SELF_BUS_PWR  
Self or Bus Power: Selects between Self- and Bus-Powered operation.  
The hub is either self-powered (draws less than 2 mA of upstream bus  
power) or bus-powered (limited to a 100 mA maximum of upstream power  
prior to being configured by the host controller).  
When configured as a bus-powered device, the SMSC hub consumes less  
than 100 mA of current prior to being configured. After configuration, the bus-  
powered SMSC hub (along with all associated hub circuitry, any embedded  
devices if part of a compound device, and 100 mA per externally available  
downstream port) must consume no more than 500 mA of upstream VBUS  
current. The current consumption is system dependent, and the OEM must  
ensure that the USB 2.0 specifications are not violated.  
When configured as a self-powered device, <1 mA of upstream VBUS  
current is consumed and all ports are available, with each port being capable  
of sourcing 500 mA of current.  
This field is set by the OEM using either the SMBus or EEPROM interface  
options.  
Please see the description under dynamic power for the self-/bus- power  
functionality when dynamic power switching is enabled.  
'0' = Bus-powered operation  
’1’ = Self-powered operation  
If dynamic power switching is enabled, this bit is ignored and the  
LOCAL_PWR pin is used to determine if the hub is operating from self or  
bus power.  
6
5
Reserved  
Reserved  
HS_DISABLE  
Hi-speed Disable: Disables the capability to attach as either a Hi-/Full-Speed  
device, and forces attachment as Full-Speed only (i.e. no Hi-Speed support).  
'0' = Hi-/Full-speed  
‘1’ = Full-speed-Only (Hi-speed disabled!)  
4
MTT_ENABLE  
Multi-TT enable: Enables one transaction translator per port operation.  
(Not available on the USB2512A/12Ai.)  
Selects between a mode where only one transaction translator is available  
for all ports (Single-TT), or each port gets a dedicated transaction translator  
(Multi-TT).  
'0' = Single TT for all ports  
‘1’ = One TT per port (when multiple TT's are supported)  
3
EOP_DISABLE  
EOP Disable: Disables EOP generation at EOF1 when in Full-Speed mode.  
During FS operation only, this permits the hub to send EOP if no  
downstream traffic is detected at EOF1. See Section 11.3.1 of the USB 2.0  
specification for additional details.  
'0' = EOP generation is normal  
‘1’ = EOP generation is disabled  
Revision 1.0 (3-11-09)  
38  
SMSC USB251x  
DATASHEET  
 复制成功!