UART Registers
19.5.1.28 Supplementary Status Register (SSR)
The supplementary status register (SSR) is shown in
and described in
.
NOTE:
Bit 1 is reset only when SCR[4] is reset to 0.
Figure 19-61. Supplementary Status Register (SSR)
15
8
Reserved
R-0
7
3
2
1
0
Reserved
DMACOUNTERRST
RXCTSDSRWAKEUPSTS
TXFIFOFULL
R-0
R/W-1
R-0
R-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 19-59. Supplementary Status Register (SSR) Field Descriptions
Bit
Field
Value
Description
15-3
Reserved
0
Reserved.
2
DMACOUNTERRST
0
The DMA counter will not be reset, if the corresponding FIFO is reset (via FCR[1] or
FCR[2]).
1
The DMA counter will be reset, if the corresponding FIFO is reset (via FCR[1] or
FCR[2]).
1
RXCTSDSRWAKEUPSTS
Pin falling edge detection: Reset only when SCR[4] is reset to 0.
0
No falling-edge event on RX, CTS, and DSR.
1
A falling edge occurred on RX, CTS, or DSR.
0
TXFIFOFULL
0
TX FIFO is not full.
1
TX FIFO is full.
3530
Universal Asynchronous Receiver/Transmitter (UART)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated