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■ CONT8
The CONT8 register is used to mask the IRQ due to an NACK source at each end point. The
address of the CONT8 register is 0006_0030
Figure 17.2-22 shows the CONT8 register.
15
Address:0006-0030
H
Table 17.2-15 lists the bits of the CONT8 register and their functions.
Table 17.2-15 Bits of the CONT8 Register
Bit name
MNACK0o
MNACKOi
MNACKn
(n: 1 to 3)
Figure 17.2-22 CONT8 Register
14
13
12
11
10
9
Polarity
This bit is used to mask IRQ assertion by a NACK
ActiveLow
signal during OUT transfer at end point 0.
This bit is used to mask IRQ assertion by a NACK
ActiveLow
signal during IN transfer at end point 0.
This bit is used to mask IRQ assertion by a NACK
ActiveLow
signal during transfer at end point n.
.
H
8
7
6
5
4
3
M
M
N
N
A
A
C
C
K
K
3
2
R/W R/W R/W R/W R/W
Function
CHAPTER 17 USB FUNCTION
2
1
0
Initial value
M
M
M
N
N
N
A
A
A
XXXXXXXXXXX00000
C
C
C
K
K
K
1
0
0
i
o
B
403
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