Download SH7760 Group USB Host Module Application Note

HcControlCurrentED Register: The HcControlCurrentED register indicates the physical address
of the current Control ED.
3
1
0 0
4 3
0
0
0
CCED
Figure 2.22 HcControlCurrentED Register
Table 2.16 HcControlCurrentED Register
Read/Write
Key
Reset
HCD
HC
Description
CCED
0h
R/W
R/W
ControlCurrentED
This field indicates a pointer of the current ED. This pointer is
advanced to the next ED after serving the present one. When
it reaches the end of the Control list, HC checks the
ControlListFilled of in HcCommandStatus. If set, it copies the
content of HcControlHeadED to HcControlCurrentED and
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.
HcBulkHeadED Register: The HcBulkHeadED register indicates the physical address of the first
ED of the Bulk list.
3
1
0 0
4 3
0
0
0
BHED
Figure 2.23 HcBulkHeadED Register
Table 2.17 HcBulkHeadED Register
Read/Write
Key
Reset
HCD
HC
Description
BHED
0h
R/W
R
BulkHeadED
HC traverses the Bulk list starting with the HcBulkHeadED
pointer.
HcBulkCurrentED Register: The HcBulkCurrentED register indicates the physical address of
the current Bulk ED.
Rev. 1.00, 10/03, page 37 of 90