Uart modem status register – Digi NS9215 User Manual
Page 412
S E R I A L C O N T R O L M O D U L E : U A R T
UART Modem Status register
412
Hardware Reference NS9215
Register
Register bit
assignment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U A R T M o d e m S t a t u s r e g i s t e r
Address: 9001_1118 / 9001_9118 / 9002_1118 / 9002_9118
The UART Modem Status register reads the modem status register. This register is
used for diagnostic purposes only.
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
30
Reserved
Reserved
OE
FE
BI
THRE
DR
FIER TEMT
PE
Bits
Access
Mnemonic
Reset
Description
D31:08
N/A
Reserved
N/A
N/A
D07
R
FIER
N/A
RX FIFO error
Indicates at least one parity, framing, or break error in the
RX FIFO.
D06
R
TEMT
N/A
Transmit holding and shift registers empty
D05
R
THRE
N/A
Transmit holding register empty
D04
R
BI
N/A
Break indicator
The receiver found a line break.
D03
R
FE
N/A
Framing error
The receiver found a framing error.
D02
R
PE
N/A
Parity error
The receiver found a parity error.
D01
R
OE
N/A
Overrun error
The RX FIFO experienced an overrun.
D00
R
DR
N/A
Data ready
Indicates a data byte is ready in the FIFO.