GE Mini COM Express 10, Hardware Reference Manual

Page: 63 / 82

6.7.9 Modem Status
This register provides access to status indicators on the UART modem interface.
UART Modem Status Register (Offset 0x6)
Bit Name Access Default
Description
7 DCD R 0
Complement of external DCD input.
Equals OUT2 in loopback mode.
6 RI R 0
Complement of external RI input. Equals
OUT1 in loopback mode.
5 DSR R 0
Complement of external DSR input.
Equals DTR in loopback mode.
4 CTS R 0
Complement of external CTS input.
Equals RTS in loopback mode.
3 DDCD R 0
Delta data carrier detect. Indicates that
the DCD line has changed state.
2 TERI R 0
Trailing edge of ring indicator. Indicates
that the RI line has changed state from
low to high.
1 DDSR R 0
Delta data set ready. Indicates that the
DSR line has changed state.
0 DCTS R 0
Delta clear to send. Indicates that the
CTS line has changed state.
FPGA Registers GFK-2896 Hardware Reference Manual 63
For public disclosure