AT43312 Datasheet, PDF (15/21 Pages) ATMEL Corporation – Self- and Bus- Powered USB Hub Controller

AT43312
Port Status Field, wPortStatus
Bit Description
0 Current Connect Status: PORT_CONNECTION
0 = no device present on this port
1 = a device is present on this port
1 Port Enabled/Disabled: PORT_ENABLE
0 = Port is disabled
1 = Port is enabled
2 Suspend: PORT_SUSPEND
0 = Not suspended
1 = Suspended
3 Over-Current Indicator: PORT_OVER_CURRENT
0 = Power operation normal for this port
1 = Over-current condition exists for this port. Power to this port has been shut off
4 Reset: PORT_RESET
0 = Reset signalling not asserted
1 = Reset signalling asserted
5-7 Reserved. Always read as 0’s.
8 Port Power: PORT_POWER
0 = This port is powered OFF
1 = This port is powered ON
9 Low Speed Device Attached: PORT_LOW_SPEED
0 = Full Speed device attached to this port
1 = Low Speed device attached to this port
10-15 Reserved. Always read as 0’s
Port Change Field, wPortChange
Bit Description
0 Connect Status Change: C_PORT_CONNECTION
0 = No change has occurred on Current Connect status
1 = Current Connect Status has changed
1 Port Enable/Disable Change: C_PORT_ENABLE
0 = No change has occurred on Port Enabled/Disabled status
1 = Port Enabled/Disabled status has changed
2 Suspend Change: C_PORT_SUSPEND
0 = No change
1 = Resume complete
3 Over-Current Indicator Change: C_PORT_OVER_CURRENT
0 = No change has occurred on Over-Current indicator
1 = Over-Current indicator has changed
4 Reset Change: C_PORT_RESET
0 = No change
1 = Reset complete
5-15 Reserved. Always read as 0’s.
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