Cirrus Logic EP93xx User Manual
Page 462
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DS785UM1
Copyright 2007 Cirrus Logic
Universal Serial Bus Host Controller
EP93xx User’s Guide
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HcControlCurrentED
Address:
0x8002_0024
Default:
0x0000_0000
Definition:
Physical address of the current endpoint descriptor of the control list.
Bit Description:
RSVD:
Reserved. Unknown During Read.
AD:
ControlCurrentED. This pointer is advanced to the next ED
after serving the present one. HC will continue processing
the list from where it left off in the last Frame. When it
reaches the end of the Control list, HC checks the
ControlListFilled of HcCommandStatus. If set, it copies the
content of HcControlHeadED to HcControlCurrentEDand
clears the bit. If not set, it does nothing. HCD is allowed to
modify this register only when the ControlListEnable of
HcControl is cleared. When set, HCD only reads the
instantaneous value of this register. Initially, this is set to
zero to indicate the end of the Control list.
HcBulkHeadED
Address:
0x8002_0028
Default:
0x0000_0000
Definition:
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RSVD
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