CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
319
(34) UF0 alternative setting status register (UF0ASS)
This register indicates the current status of the Alternative Setting.
This register is read-only, in 8-bit units.
Check this register when the SET_INT interrupt request has been issued. The value received by the
SET_INTERFACE request is reflected on the UF0IFn register (n = 0 to 4) as well as on this register.
0
UF0ASS
0
5
0
0
3
AL5ST3
2
AL5ST2
1
AL5ST1
AL2ST
Address
FF72H
After reset
00H
0
4
6
7
Bit position
Bit name
Function
These bits indicate the current status of the five-series Alternative Setting.
AL5ST3
AL5ST2
AL5ST1
Selected Alternative Setting number
1
0
0
Alternative Setting 4
0
1
1
Alternative Setting 3
0
1
0
Alternative Setting 2
0
0
1
Alternative Setting 1
0
0
0
Alternative Setting 0
3 to 1
AL5ST3 to
AL5ST1
0
AL2ST
This bit indicates the current status of the two-series Alternative Setting (selected
Alternative Setting number).
1: Alternative Setting 1
0: Alternative Setting 0
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