Datasheet

Section 14 Universal Serial Bus (USB)
Rev.7.00 Dec. 24, 2008 Page 488 of 698
REJ09B0074-0700
Bit Bit Name Initial Value R/W Description
7 to 3 — All 0 R Reserved
These bits are always read as 0 and cannot be
modified.
2 EP1DE 0 R EP1 Data Enable
0: Indicates that the EP1 contains no valid data.
1: Indicates that the EP1 contains valid data.
EP1DE corresponds to the negative-electrode
signal for EP1ALLEMPTYs in UIFR1.
1 EP3DE 0 R EP3 Data Enable
0: Indicates that the EP3 contains no valid data.
1: Indicates that the EP3 contains valid data.
0 EP0iDE 0 R EP0i Data Enable
0: Indicates that the EP0i contains no valid data.
1: Indicates that the EP0i contains valid data.
14.3.26 USB Configuration Value Register (UCVR)
UCVR stores the Configuration value when the Set_Configuration command is received from the
host.
Bit Bit Name Initial Value R/W Description
7, 6 — All 0 R Reserved
These bits are always read as 0 and cannot be
modified.
5 CNFV0 0 R 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.
4 to 0 — All 0 R Reserved
These bits are always read as 0 and cannot be
modified.