Uart modem control register, Uart line status register – Digi NS9215 User Manual
Page 411
. . . . .
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 Control register
www.digiembedded.com
411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U A R T M o d e m C o n t r o l r e g i s t e r
Address: 9001_1110 / 9001_9110 / 9002_1110 / 9002_9110
The UART Modem Control register controls the modem signals.
Register
Register bit
assignment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U A R T L i n e S t a t u s r e g i s t e r
Address: 9001_1114 / 9001_9114 / 9002_1114 / 9002_9114
The UART Line Status register reads the line 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
RTS
Reserved
LLB
AFE
DTR
Bits
Access
Mnemonic
Reset
Description
D31:06
N/A
Reserved
N/A
N/A
D05
R/W
AFE
0
Automatic flow control
0
RTS controlled by bit 1 (RTS)
1
RTS controlled by 4-byte RX FIFO status
D04
R/W
LLB
0
Local loopback enable bit
TX data looped back to RX data
0
Disabled
1
Enabled
D03:02
N/A
Reserved
N/A
N/A
D01
R/W
RTS
0
Controls the Request to Send (RTS) output
0
RTS = 1
1
RTS = 0
D00
R/W
DTR
0
Controls the Data Terminal Ready (DTR) output
0
DTR = 1
1
DTR = 0