UART Registers
19.5.1.14 Line Status Register (LSR) - CIR Mode
The CIR line status register (LSR) is shown in
and described in
Figure 19-47. CIR Line Status Register (LSR)
15
8
Reserved
R-0
7
6
5
4
1
0
THREMPTY
Reserved
RXSTOP
Reserved
RXFIFOE
R-1
R-0
R-0
R-0
R-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 19-43. CIR Line Status Register (LSR) Field Descriptions
Bit
Field
Value
Description
15-8
Reserved
0
Reserved.
7
THREMPTY
0
Transmit holding register (TX FIFO) is not empty.
1
Transmit hold register (TX FIFO) is empty. The transmission is not necessarily completed.
6
Reserved
0
Reserved.
5
RXSTOP
The RXSTOP is generated based on the value set in the BOF Length register (EBLR).
0
Reception is on going or waiting for a new frame.
1
Reception is completed. It is cleared on a single read of the LSR register.
4-1
Reserved
0
Reserved
0
RXFIFOE
0
At least one data character in the RX FIFO.
1
No data in the receive FIFO.
3519
SPRUH73H – October 2011 – Revised April 2013
Universal Asynchronous Receiver/Transmitter (UART)
Copyright © 2011–2013, Texas Instruments Incorporated