Usb Transceiver Control Register (Usbxvercr) - Renesas HD6417641 Hardware Manual

Section 20 USB Function Module
Bit Bit Name
2 EP2STL
1 EP1STL
0 EP0STL

20.3.22 USB Transceiver Control Register (USBXVERCR)

The USB transceiver control register (USBXVERCR) selects the on-chip transceiver or the
external transceiver. Make sure to check if USBIFR1/VBUSMN=0 (VBUS pin disconnection) to
overwrite this register.
USBXVERCR can be initialized to H'00 by a power-on reset.
Bit Bit Name

7 to 1
0 XVEROFF
Rev. 4.00 Sep. 14, 2005 Page 764 of 982
REJ09B0023-0400
Initial
Value R/W Description
0 R/W EP2 Stall
When this bit is set to 1, endpoint 2 is placed in the
stall state.
0 R/W EP1 Stall
When this bit is set to 1, endpoint 1 is placed in the
stall state.
0 R/W EP0 Stall
When this bit is set to 1, endpoint 0 is placed in the
stall state.
Initial
Value R/W Description
All 0 R Reserved
The write value should always be 0.
0 R/W Transceiver Control
1: The on-chip transceiver operates.
0: The on-chip transceiver function stops, and digital
signals for the external transceiver are output from
the port.