UART Registers
19.5.1.33
Wake-Up Enable Register (WER)
The wake-up enable register (WER) is used to mask and unmask a UART event that subsequently notifies
the system. An event is any activity in the logic that can cause an interrupt and/or an activity that requires
the system to wake up. Even if wakeup is disabled for certain events, if these events are also an interrupt
to the UART, the UART still registers the interrupt as such. The wake-up enable register (WER) is shown
in
and described in
.
Figure 19-66. Wake-Up Enable Register (WER)
15
8
Reserved
R-0
7
6
5
4
3
2
1
0
TXWAKEUPEN
RLS_INTERRUPT
RHR_INTERRUPT
RX_ ACTIVITY
DCD_ACTIVITY
RI_ ACTIVITY
DSR_ACTIVITY
CTS_ACTIVITY
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 19-64. Wake-Up Enable Register (WER) Field Descriptions
Bit
Field
Value
Description
15-8
Reserved
0
Reserved.
7
TXWAKEUPEN
Wake-up interrupt.
0
Event is not allowed to wake up the system.
1
Event can wake up the system: Event can be: THRIT or TXDMA request and/or
TXSATUSIT.
6
RLS_ INTERRUPT
Receiver line status interrupt.
0
Event is not allowed to wake up the system.
1
Event can wake up the system.
5
RHR_ INTERRUPT
RHR interrupt.
0
Event is not allowed to wake up the system.
1
Event can wake up the system.
4
RX_ ACTIVITY
0
Event is not allowed to wake up the system.
1
Event can wake up the system.
3
DCD_ACTIVITY
0
Event is not allowed to wake up the system.
1
Event can wake up the system.
2
RI_ ACTIVITY
0
Event is not allowed to wake up the system.
1
Event can wake up the system.
1
DSR_ACTIVITY
0
Event is not allowed to wake up the system.
1
Event can wake up the system.
0
CTS_ ACTIVITY
0
Event is not allowed to wake up the system.
1
Event can wake up the system.
3534
Universal Asynchronous Receiver/Transmitter (UART)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated