F81866A
UART Data Terminal Ready. An active low signal
informs the modem or data set that controller is ready
to communicate.
DTR3#
GPIO33
RTS3#
O8
I/OOD8st, 5v
O8
39
40
3VCC
3VCC
General Purpose IO.
UART Request To Send. An active low signal informs
the modem or data set that the controller is ready to
send data.
General Purpose IO.
GPIO34
I/OOD8st, 5v
Data Set Ready. An active low signal indicates the
modem or data set is ready to establish
communication link and transfer data to the UART.
a
DSR3#
INst,5v
41
42
3VCC
3VCC
GPIO35
SOUT3
I/OOD8st, 5v
O8
General Purpose IO.
UART Serial Output. Used to transmit serial data out
to the communication link.
General Purpose IO.
GPIO36
I/OOD8st, 5v
UART Serial Input. Used to receive serial data
through the communication link.
SIN3
INst,5v
I/OOD8st, 5v
INst,5v
43
44
3VCC
3VCC
GPIO37
DCD4#
General Purpose IO.
Data Carrier Detect. An active low signal indicates the
modem or data set has detected a data carrier.
General Purpose IO.
GPIO40
RI4#
I/OOD8st, 5v
Ring Indicator. An active low signal indicates that a
ring signal is being received from the modem or data
set.
INst,5v
45
46
47
3VCC
3VCC
3VCC
GPIO41
CTS4#
I/OOD8st, 5v
INst,5v
General Purpose IO.
Clear To Send is the modem control input.
General Purpose IO.
GPIO42
I/OOD8st, 5v
UART Data Terminal Ready. An active low signal
informs the modem or data set that controller is ready
to communicate.
DTR4#
GPIO43
RTS4#
O8
I/OOD8st, 5v
General Purpose IO.
UART Request To Send. An active low signal informs
the modem or data set that the controller is ready to
send data.
O8
48
49
3VCC
3VCC
General Purpose IO.
GPIO44
I/OOD8st, 5v
Data Set Ready. An active low signal indicates the
modem or data set is ready to establish
communication link and transfer data to the UART.
a
DSR4#
INst,5v
GPIO45
SOUT4
I/OOD8st, 5v
O8
General Purpose IO.
UART Serial Output. Used to transmit serial data out
to the communication link.
50
51
3VCC
3VCC
General Purpose IO.
GPIO46
I/OOD8st, 5v
UART Serial Input. Used to receive serial data
through the communication link.
SIN4
INst,5v
GPIO47
I/OOD8st, 5v
General Purpose IO.
26
Jan, 2012
V0. 12P