Datasheet

UART
Intel
®
Quark™ microcontroller D2000
January 2016 Datasheet
Document Number: 333577-002EN 211
14.3.1.7 MODEM Status (MSR)
Provides the current state of the control lines from the MODEM (or peripheral device).
MEM Offset (B0002000) 0B0002018h
Security_PolicyGroup
IntelRsvd False
Size 32 bits
Default 0000_0000h
Bits Access
Type
Default Description PowerWell ResetSignal
31:8 RO 24'b0 Reserved (RSV)
7 RO 1'h0 Data Carrier Detect (DCD)
Used to indicate the current
state of the modem control
line dcd_n. That is this bit is
the complement dcd_n. When
the Data Carrier Detect input
(dcd_n) is asserted it is an
indication that the carrier has
been detected by the modem
or data set.
0 = dcd_n input is de-asserted
(logic 1)
1 = dcd_n input is asserted
(logic 0)
In Loopback Mode (MCR[4] set
to one), DCD is the same as
MCR[3] (Out2).
6 RO 1'h0 Ring Indicator (RI)
Used to indicate the current
state of the modem control
line ri_n. That is this bit is the
complement ri_n. When the
Ring Indicator input (ri_n) is
asserted it is an indication that
a telephone ringing signal has
been received by the modem
or data set.
0 = ri_n input is de-asserted
(logic 1)
1 = ri_n input is asserted
(logic 0)
In Loopback Mode (MCR[4] set
to one), RI is the same as
MCR[2] (Out1).
5 RO 1'h0 Data Set Ready (DSR)