SH7760 Datasheet, PDF (775/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

Bits Bit Name Initial Value R/W Description
2
BLF
0
R/W Bulk List Filled
This bit is used to indicate whether there are any
TDs in the list. HCD sets this bit to 1 for the list when
adding TD to ED.
When starting to process the head of the list, HC
checks BF. As long as BLF is 0, HC does not start to
process the list. When BLF is 1, HC starts to process
the list to set BF through 0. When HC finds TD in the
list, HC sets BLF to 1. When TD is not in the list and
HCD does not set BLF, HC completes processing
the list. When list processing is stopped, BLF
remains 0.
0: TD is not found in the Bulk list
1: TD is found in the Bulk list
1
CLF
0
R/W Control List Filled
This bit is used to indicate whether there are any
TDs in the control list. HCD sets this bit when adding
TD to ED in the control list.
When HC starts to process the head of the control
list, it checks CLF. As long as CLF is 0, HC does not
start to process the control list. When CF is 1, HC
starts to process the control list and clears CLF to 0.
When HC finds TD in the list, HC sets CLF to 1.
When TD is not found in the control list and HCD
does not set CLF, HC completes the processing of
the control list. When control list processing is
stopped, CLF remains 0.
0: TD is not found in the Control list
1: TD is found in the Control list
Rev. 1.0, 02/03, page 725 of 1294