Ampro Corporation XTX 820 Benutzerhandbuch
Chapter 3
Hardware
XTX 820
Reference Manual
37
Serial Ports 1 and 2
The Super I/O (W83627HG) provides the circuitry for two serial ports with TTL compatible. Serial
ports 1 (COM1) and 2 (COM2) are provided to the baseboard through connector J3. The serial port
features are:
ports 1 (COM1) and 2 (COM2) are provided to the baseboard through connector J3. The serial port
features are:
•
Two individual 16550-compatible UARTs
•
Programmable word length, stop bits and parity
•
16-bit programmable baud rate generator
•
Loop-back mode
•
Two individual 16-bit FIFOs
The standard serial DB9 cable pin-outs are listed in Table 3-18 for reference along with the J3 connector
pins. DB9 connectors can be located on the custom baseboard, as application requires.
pins. DB9 connectors can be located on the custom baseboard, as application requires.
Table 3-18. Simplified Serial Interface Pin/Signal Descriptions (J3)
J3
Pin #
Pin #
Pin #
DB9
DB9
Signal
Description
89
1
(COM1)
DCD1*
Data Carrier Detect 1 – Indicates external serial device is detecting a carrier
signal (i.e., a communication channel is currently open). In direct connect
environments, this input is driven by DTR1 as part of the DTR1/DSR1
handshake.
signal (i.e., a communication channel is currently open). In direct connect
environments, this input is driven by DTR1 as part of the DTR1/DSR1
handshake.
91
6
DSR1*
Data Set Ready 1 – Indicates external serial device is powered, initialized,
and ready. Used as hardware handshake with DTR1 for overall readiness.
and ready. Used as hardware handshake with DTR1 for overall readiness.
83
2
RXD1
Receive Data 1 – Serial port 1 receive data in.
85
7
RTS1*
Request To Send 1 – Indicates Serial port 1 is ready to transmit data. Used
as hardware handshake with CTS1 for low level flow control.
as hardware handshake with CTS1 for low level flow control.
95
3
TXD1
Transmit Data 1 – Serial port 1 transmit data out
93
8
CTS1*
Clear To Send 1 – Indicates external serial device is ready to receive data.
Used as hardware handshake with RTS1 for low level flow control.
Used as hardware handshake with RTS1 for low level flow control.
87
4
DTR1*
Data Terminal Ready 1 – Indicates Serial port 1 is powered, initialized, and
ready. Used as hardware handshake with DSR1 for overall readiness.
ready. Used as hardware handshake with DSR1 for overall readiness.
97
9
RI1*
Ring Indicator 1 – Indicates external serial device is detecting a ring
condition. Used by software to initiate operations to answer and open the
communications channel.
condition. Used by software to initiate operations to answer and open the
communications channel.
5
GND
Ground
10
NC
KEY/NC Key/Not connected
71
1
(COM2)
DCD2*
Data Carrier Detect 2 – Indicates external serial device is detecting a carrier
signal (i.e., a communication channel is currently open). In direct connect
environments, this input is driven by DTR2 as part of the DTR2/DSR2
handshake.
signal (i.e., a communication channel is currently open). In direct connect
environments, this input is driven by DTR2 as part of the DTR2/DSR2
handshake.
73
6
DSR2*
Data Set Ready 2 – Indicates external serial device is powered, initialized,
and ready. Used as hardware handshake with DTR2 for overall readiness.
and ready. Used as hardware handshake with DTR2 for overall readiness.
63
2
RXD2
Receive Data 2 – Serial port 2 receive data in
67
7
RTS2*
Request To Send 2 – Indicates Serial port 2 is ready to transmit data. Used
as hardware handshake with CTS2 for low level flow control.
as hardware handshake with CTS2 for low level flow control.
77
3
TXD2
Transmit Data 2 – Serial port 2 transmit data out