Fifo interrupt status 0 register, Fifo interrupt status 1 register – Digi NS9750 User Manual
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U S B C o n t r o l l e r M o d u l e
FIFO Interrupt Status 0 register
Address: 9010 3000
Register bit assignment
FIFO Interrupt Status 1 register
Address: 9010 3010
Bits
Access
Mnemonic
Reset
Description
D31:16
N/A
Not used
0x0000
Always read as 0x0000.
D15
RW1TC
ACK2
0
Endpoint 0 (CTRL-In) acknowledge status. See
Table 449, “USB device endpoint status,” on page 770.
D14
RW1TC
NACK2
0
Endpoint 0 (CTRL-In) negative acknowledge status. See
Table 449, “USB device endpoint status,” on page 770.
D13
RW1TC
ERROR2
0
Endpoint 0 (CTRL-In) error status. See Table 449, “USB
device endpoint status,” on page 770.
D12:08
N/A
Reserved
N/A
Not valid in DMA mode.
D07
RW1TC
ACK1
0
Endpoint 0 (CTRL-Out) acknowledge status. See
Table 449, “USB device endpoint status,” on page 770
D06
RW1TC
NACK1
0
Endpoint 0 (CTRL-Out) negative acknowledge status. See
Table 449, “USB device endpoint status,” on page 770.
D05
RW1TC
ERROR1
0
Endpoint 0 (CTRL-Out) error status. See Table 449,
“USB device endpoint status,” on page 770.
D04:00
N/A
Reserved
N/A
Not valid in DMA mode.
Table 450: FIFO Interrupt Status 0 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
Reserved
ERROR
2
Reserved
ACK2 NACK
2
Reserved
ACK1 NACK
1
ERROR
1