ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 302 -
Revision 2.4
Modem Status Register (UARTn_MODEMSTS)
Register
Offset
R/W Description
Reset Value
UARTn_MODEMSTS
U0x14 R/W UART Modem Status Register.
0x0000_0010
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
CTSACTLV
7
6
5
4
3
2
1
0
Reserved
CTSSTS
Reserved
CTSDETF
Table 5-122 UART Modem Status Register (UARTn_MODEMSTS, address 0x4005_0014)
Bits
Description
[31:9]
Reserved
Reserved.
[8]
CTSACTLV
Clear-to-send (CTS) Active Trigger Level
This bit can change the CTS trigger level.
0= CTS is active low level.
1= CTS is active high level.
[7:5]
Reserved
Reserved.
[4]
CTSSTS
CTS Pin Status (Read Only)
This bit is the pin status of CTS.
[3:1]
Reserved
Reserved.
[0]
CTSDETF
Detect CTS State Change Flag
This bit is set whenever CTS input has state change. It will generate Modem
interrupt to CPU when UART_INTEN.MODEMIEN = 1.
NOTE: This bit is cleared by writing 1 to itself.