參數(shù)資料
型號(hào)： AT43312
廠商： Atmel Corp.
英文描述： Self- and Bus- Powered USB Hub Controller
中文描述： 自和總線供電的USB集線器控制器
文件頁(yè)數(shù)： 14/21頁(yè)
文件大小： 157K
代理商： AT43312
AT43312
14
Get_Port_Status
Returns the current port status and the states that have
changed since the previous acknowledgment in the form of
two words of data. This is described in the following two
tables. Word0 is the Port Status Field, and Word1 is the
Port Change Field. The Hub Controller will respond with a
STALL if Port0 or a port higher than Port4 is addressed in
this request.
Hub Status Field, wHubStatus
Bit
Description
0
Local Power Status, indicates the state of the local power supply.
0 = Local power supply good
1 = Local power supply lost
Over-Current Indicator, indicates over-current condition on a global hub basis. AT43312 reports over-current condition on a
per port basis therefore this bit is always read as 0.
2-15
Reserved. Always read as 0’s
Bus Powered Mode:
Bit
Description
0
Local Power Status. In the bus-powered configuration, the AT43312 will return a 0 if this bit is read.
Hub Change Field, wHubChange
Bit
Description
0
Local Power Status Change, C_HUB_OVER_POWER, corresponds to bit 0 of wHubStatus.
0 = No change has occurred in local power status
1 = Local power status has changed
1
Over-Current Indicator Change, C_HUB_OVER_CURRENT, corresponds to bit 1 of wHubStatus. AT43312 reports over-
current condition on a per port basis and therefore this bit is always read as 0.
2-15
Reserved. Always read as 0’s
Bus Powered Mode:
Bit
Description
0
Local Power Status Change. In the bus-powered configuration, the AT43312 will return as 0 if this bit is read.
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