SAM3S8C Atmel Corporation, SAM3S8C Datasheet - Page 990

• Manufacturer Part Number: SAM3S8C
• Manufacturer: Atmel Corporation

36.7.12
Name:
Address:
Access:
WARNING: The UDP peripheral clock in the Power Management Controller (PMC) must be enabled before any read/write
operations to the UDP registers including the UDP_TXVC register.
• TXVDIS: Transceiver Disable
When UDP is disabled, power consumption can be reduced significantly by disabling the embedded transceiver. This can
be done by setting TXVDIS field.
To enable the transceiver, TXVDIS must be cleared.
• PUON: Pullup On
0: The 1.5KΩ integrated pullup on DDP is disconnected.
1: The 1.5 KΩ integrated pullup on DDP is connected.
NOTE: If the USB pullup is not connected on DDP, the user should not write in any UDP register other than the UDP_TXVC
register. This is because if DDP and DDM are floating at 0, or pulled down, then SE0 is received by the device with the con-
sequence of a USB Reset.
990
990
31
23
15
–
–
–
7
–
SAM3S8/SD8
SAM3S8/SD8
UDP Transceiver Control Register
30
22
14
UDP_TXVC
0x40034074
Read-write
–
–
–
6
–
29
21
13
–
–
–
5
–
28
20
12
–
–
–
4
–
27
19
11
–
–
–
3
–
26
18
10
–
–
–
2
–
PUON
25
17
–
–
9
1
–
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
TXVDIS
24
16
–
–
8
0
–