Cirrus Logic EP93xx User Manual
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DS785UM1
Copyright 2007 Cirrus Logic
Universal Serial Bus Host Controller
EP93xx User’s Guide
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OCIC:
PortOverCurrentIndicatorChange. This bit is valid only if
overcurrent conditions are reported on a per-port basis.
This bit is set when Root Hub changes the
PortOverCurrentIndicator bit. The HCD writes a “1” to
clear this bit. Writing a “0” has no effect.
0 = no change in PortOverCurrentIndicator
1 = PortOverCurrentIndicator has changed
PRSC:
PortResetStatusChange. This bit is set at the end of the
10 ms port reset signal. The HCD writes a “1” to clear this
bit. Writing a “0” has no effect.
0 = port reset is not complete
1 = port reset is complete
USBCfgCtrl
Address:
0x8002_0080 - Read/Write
Default:
0x0000_0000
Definition:
Used to implement some input signals to USB host controller for configuration
through software.
Bit Descriptions:
RSVD:
Reserved. Unknown During Read.
TPOC:
When asserted by software, the corresponding port will
enter DISCONNECT state. These bits must be cleared
before the ports can be reused.
TRCS:
Inverted internally and sent out as APP_CntSelN signal to
uhostc_top. Internally known as TicRegCntSel.
APP_CntSelN is used for selecting the counter value for
either simulation or real-time for the 1 ms frame duration
used internally. It should be usually set to “0”. Setting it to
“1” will cause the internal counter count to be a partial full
count.
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RSVD
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RSVD
TRCS
TPOC
RSVD