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CHAPTER 17 USB FUNCTION
■ CONT5
The CONT5 register is used to set each end point into USB busy status. The address of the
CONT5 register is 0006_002A
Figure 17.2-19 shows the CONT5 register.
Address:0006-002A
H
Table 17.2-12 lists the bits of the CONT5 register and their functions.
Table 17.2-12 Bits of the CONT5 Register
Bit name
DFIFOBUSYn
(n: 1 to 2)
To perform transfer by DMA, the NACK handshake can always be returned in response to a
token from the HOST when writting 0 to FIFOBUSYn. Always write 0 to this bit for DMA transfer.
To perform transfer by CPU access, always set to 0.
To write 0 to DFIFOBUSYn, the DREQ is masked by setting MDREQ bit to 0.
400
.
H
Figure 17.2-19 CONT5 Register
15
14
13
12
11
10
Polarity
ActiveLow
9
8
7
6
5
4
R/W
Function
This bit is used to set end point n into the busy
status.
3
2
1
0
Initial value
D
D
F
F
I
I
F
F
O
O
XXXXXXXXXXXX00XX
B
B
U
U
S
S
Y
Y
2
1
R/W
B
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