Usb Configuration Value Register (Ucvr) - Hitachi H8S/2215 Series Hardware Manual

15.3.39 USB Configuration Value Register (UCVR)

UCVR stores the Configuration value, Interface Number value and Alternate Setting value when
the Set_Configuration and Set_Interface commands are received from the host.
Bit Bit Name
7 —
6 —
5 CNFV0
4 INTV1
3 INTV0
2 ATLV2
1 ATLV1
0 ATLV0
Initial Value R/W
0 R
0 R
0 R
0 R
0 R
0 R
0 R
0 R
Description
Reserved
These bits are always read as 0 and cannot be
modified.
Configuration Value 0
Stores the Configuration value when the
Set_Configuration command is received. CNFV0 is
modified when the SETC bit in UIFR3 is set to 1.
Interface Number Value 1, 0
Store the Interface number value when the
Set_Interface command is received. INTV1 and
INTV0 are modified when the SETI bit in UIFR3 is
set to 1.
Alternate Setting Value 2 to 0
Store the Alternate Setting value when the
Set_Interface command is received. ATLV2 to
ATLV0 are modified when the SETI bit in UIFR3 is
set to 1.
Rev. 3.0, 10/02, page 475 of 686