Digi NS9215 User Manual
Page 413
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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
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413
Register
Register bit
assignment
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
DDSR
DDCD
CTS
DSR
DCTS
DCD
RI
TERI
Bits
Access
Mnemonic
Reset
Description
D31:08
N/A
Reserved
N/A
N/A
D07
R
DCD
N/A
Reflects the status of the data carrier detect input.
D06
R
RI
N/A
Reflects the status of the ring indicator.
D05
R
DSR
N/A
Reflects the status of the data set ready input.
D04
R
CTS
N/A
Reflects the status of the clear to send input.
D03
R
DDCD
N/A
Delta DCD indicator
Indicates that an edge was found on DCD since the last
time the register was read.
D02
R
TERI
N/A
Trailing edge of RI indicator
Indicates that RI has changed from a 0 to a 1.
D01
R
DDSR
N/A
Delta DSR indicator
Indicates that an edge was found on DSR since the last
time the register was read.
D00
R
DCTS
N/A
Delta CTS indicator
Indicates that an edge was found on CTS since the last
time the register was read.