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(32) UF0 active interface number register (UF0AIFN)
This register sets the valid Interface number that correctly responds to the GET/SET_INTERFACE request.
Because Interface 0 is always valid, Interfaces 1 to 4 can be selected.
This register can be read or written in 8-bit units.
UF0AIFN
Bit position
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CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
7
6
5
ADDIF
0
0
Bit name
7
ADDIF
This bit allows use of Interfaces numbered other than 0.
1: Support up to the Interface number specified by the IFNO1 and IFNO0 bits.
0: Support only Interface 0 (default value).
Setting bits 1 and 0 of this register is invalid when this bit is not set to 1.
1, 0
IFNO1,
These bits specify the range of Interface numbers to be supported.
IFNO0
4
3
2
0
0
0
IFNO1
IFNO0
1
1
0, 1, 2, 3, 4
1
0
0, 1, 2, 3
0
1
0, 1, 2
0
0
0, 1
Preliminary User's Manual U19014EJ1V0UD
1
0
Address
IFNO1
IFNO0
FF70H
Function
Valid Interface No.
After reset
00H
317
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