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SERIAL CONTROL MODULE: UART
UART Modem Status register
www.digiembedded.com 413
Register
Register bit
assignment
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Reserved
Reserved
DDSRDDCDCTSDSR DCTSDCD 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.