UART Registers
19.5.1.23 Status FIFO Register Low (SFREGL)
The frame lengths of received frames are written into the status FIFO. This information can be read by
reading the status FIFO register low (SFREGL) and the status FIFO register high (SFREGH). These
registers do not physically exist. The LSBs are read from SFREGL and the MSBs are read from SFREGH.
Reading these registers does not alter the status FIFO read pointer. These registers must be read before
the pointer is incremented by reading the SFLSR. The status FIFO register low (SFREGL) is shown in
and described in
.
Figure 19-56. Status FIFO Register Low (SFREGL)
15
8
7
0
Reserved
SFREGL
R-0
R-unknown
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 19-54. Status FIFO Register Low (SFREGL) Field Descriptions
Bit
Field
Value
Description
15-8
Reserved
0
Reserved.
7-0
SFREGL
0-FFh
LSB part of the frame length.
19.5.1.24 Status FIFO Register High (SFREGH)
The frame lengths of received frames are written into the status FIFO. This information can be read by
reading the status FIFO register low (SFREGL) and the status FIFO register high (SFREGH). These
registers do not physically exist. The LSBs are read from SFREGL and the MSBs are read from SFREGH.
Reading these registers does not alter the status FIFO read pointer. These registers must be read before
the pointer is incremented by reading the SFLSR. The status FIFO register high (SFREGH) is shown in
and described in
.
Figure 19-57. Status FIFO Register High (SFREGH)
15
4
3
0
Reserved
SFREGH
R-0
R-unknown
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 19-55. Status FIFO Register High (SFREGH) Field Descriptions
Bit
Field
Value
Description
15-4
Reserved
0
Reserved.
3-0
SFREGH
0-Fh
MSB part of the frame length.
3526
Universal Asynchronous Receiver/Transmitter (UART)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated