HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 814

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 20 USB Function Module
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.
Rev. 4.00 Sep. 14, 2005 Page 764 of 982
REJ09B0023-0400
Bit
2
1
0
Bit
7 to 1
0
Bit Name
EP2STL
EP1STL
EP0STL
Bit Name

XVEROFF
Initial
Value
0
0
0
Initial
Value
All 0
0
R/W
R/W
R/W
R/W
R/W
R
R/W
Description
EP2 Stall
When this bit is set to 1, endpoint 2 is placed in the
stall state.
EP1 Stall
When this bit is set to 1, endpoint 1 is placed in the
stall state.
EP0 Stall
When this bit is set to 1, endpoint 0 is placed in the
stall state.
Description
Reserved
The write value should always be 0.
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.