UART Registers
19.5.1.5 Interrupt Enable Register (IER) - CIR Mode
The CIR interrupt enable register (IER) can be programmed to enable/disable any interrupt. There are 5
types of interrupt in these modes, TX status, RX overrun, RX stop interrupt, THR interrupt, and RHR
interrupt. Each interrupt can be enabled/disabled individually. The CIR interrupt enable register (IER) is
shown in
and described in
.
NOTE:
In CIR mode, the TXSTATUSIT bit has only one meaning corresponding to the case
MDR2[0] = 0.
The RXSTOPIT interrupt is generated based on the value set in the BOF Length register
(EBLR).
Figure 19-38. CIR Interrupt Enable Register (IER)
15
8
Reserved
R-0
7
6
5
4
3
2
1
0
Reserved
TXSTATUSIT
Reserved
RXOVERRUNIT
RXSTOPIT
THRIT
RHRIT
R-0
R/W-0
R-0
R/W-0
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 19-34. CIR Interrupt Enable Register (IER) Field Descriptions
Bit
Field
Value
Description
15-6
Reserved
0
Reserved.
5
TXSTATUSIT
0
Disables the TX status interrupt.
1
Enables the TX status interrupt.
4
Reserved
0
Reserved.
3
RXOVERRUNIT
0
Disables the RX overrun interrupt.
1
Enables the RX overrun interrupt.
2
RXSTOPIT
0
Disables the RX stop interrupt.
1
Enables the RX stop interrupt.
1
THRIT
0
Disables the THR interrupt.
1
Enables the THR interrupt.
0
RHRIT
0
Disables the RHR interrupt.
1
Enables the RHR interrupt.
3510
Universal Asynchronous Receiver/Transmitter (UART)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated