82C862 Datasheet, PDF (22/51 Pages) List of Unclassifed Manufacturers – FireLink USB Dual Controller Quad Port USB

FireLink USB
82C862
The 82C862 logic also supports both Global and per-port overcurrent detection as follows.
Global overcurrent mode – either PWRFLT1# or PWRFLT2# can be used to detect an overcurrent condition on any port on
USB Host 1, and either PWRFLT3# or PWRFLT4# can be used to detect an overcurrent condition on any port on USB Host 2.
For example, if PWRFLT1# is asserted, it means an overcurrent condition exists on USB Host 1, resulting in power shutoff for
both ports on USB Host 1, and setting of the appropriate global overcurrent indicator bits.
Register
HcRhDescriptorA
HcRhDescriptorA
HcRhStatus
HcRhStatus
HcRhPort1Status
HcRhPort2Status
HcRhPort1Status
HcRhPort2Status
Field
NoOvercurrentProtection
MEMOFST 49h[4]
OverCurrentProtectionMode
MEMOFST 49h[3]
OverCurrentIndicator
MEMOFST 50h[1]
OverCurrentIndicatorChange
MEMOFST 52h[1]
PortOverCurrentIndicator
MEMOFST 54h[3] port 1
MEMOFST 58h[3] port 2
PortOverCurrentIndicatorChange
MEMOFST 56h[3] port 1
MEMOFST 5Ah[3] port 2
Value or Function
0: Over-current status is reported
0: Global - Over-current reported
collectively for all ports
1: Global over-current exists
0: power operations normal
Set by hardware when
OverCurrentIndicator bit changes.
Write a ‘1’ to clear this bit.
Not used, set to ‘0’ for global over-
current.
Not used, set to ‘0’ for global over-
current.
Per-Port overcurrent mode – PWRFLT1 #, PWRFLT2#, PWRFLT3#, and PWRFLT4# are all used to monitor each port
individually. If an overcurrent condition exists on one port, power is only shut off to that port.
Register
HcRhDescriptorA
HcRhDescriptorA
HcRhStatus
HcRhStatus
HcRhPort1Status
HcRhPort2Status
HcRhPort1Status
HcRhPort2Status
Field
NoOvercurrentProtection
MEMOFST 49h[4]
OverCurrentProtectionMode
MEMOFST 49h[3]
OverCurrentIndicator
MEMOFST 50h[1]
OverCurrentIndicatorChange
MEMOFST 52h[1]
PortOverCurrentIndicator
MEMOFST 54h[3] port 1
MEMOFST 58h[3] port 2
PortOverCurrentIndicatorChange
MEMOFST 56h[3] port 1
MEMOFST 5Ah[3] port 2
Value or Function
0: Over-current status is reported
1: Over-current is reported on a per-
port basis
Not used, always ‘0’ for per-port
over-current mode.
Not used, always ‘0’ for per-port
over-current mode.
0: no over-current condition
1: over-current condition exists
Set by hardware when
PortOverCurrentIndicator bit
changes. Write a ‘1’ to clear this bit.
®
Page 18
912-2000-030
Revision: 1.0