Hcbulkcurrented register, Register bit assignment, Table 433: hcbulkheaded register – Digi NS9750 User Manual
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U S B h o s t b l o c k r e g i s t e r s
7 4 4
N S 9 7 5 0 H a r d w a r e R e f e r e n c e
Register bit assignment
HcBulkCurrentED register
Address: 9010 102C
The HcBulkCurrentED register contains the physical address of the bulk list’s current
endpoint. As the bulk list will be served in round-robin fashion, the endpoints will be
ordered according to their insertion in the list.
Bits
Access
Mnemonic
Reset
Description
D31:04
R/W
BHED
0h
BulkHeadED
The host controller traverses the bulk list starting with the
HcBulkHeadED pointer. The content is loaded from the
host controller communication area during the host
controller initialization.
D03:00
N/A
Not used
0
Must be written to 0.
Table 433: HcBulkHeadED register
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
30
BCED
Not used
BCED