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Chapter 3
Hardware
40
Reference Manual
ReadyBoard 700
Serial A Interface (J5A/B)
Table 3-12. Serial A (Serial 1) Interface Pin/Signal Descriptions (J5A)
Pin #
Signal
Description
1
DCD1*
Data Carrier Detect 1 – Indicates external serial communications device is
detecting a carrier signal (i.e., a communication channel is currently open). In
direct connect environments, this input will be driven by DTR1 as part of the
DTR/DSR handshake.
2
RXD1
Receive Data 1 – Serial port 1 receive data in
3
TXD1
Transmit Data 1 – Serial port 1 transmit data out
4
DTR1*
Data Terminal Ready 1 – Indicates Serial port 1 is powered, initialized, and ready.
Used as hardware handshake with DSR1 for overall readiness to communicate.
5
GND
Digital Ground
6
DSR1*
Data Set Ready 1 – Indicates external serial communications device is powered,
initialized, and ready. Used as hardware handshake with DTR1 for overall
readiness to communicate.
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.
8
CTS1*
Clear To Send 1 – Indicates external serial communications device is ready to
receive data. Used as hardware handshake with RTS1 for low level flow control.
9
RI1*
Ring Indicator 1 – Indicates external serial communications device is detecting a
ring condition. Used by software to initiate operations to answer and open the
communications channel.
Notes:
The shaded area denotes power or ground. The signals marked with * = Negative true logic.
Table 3-13. Serial A (Serial 2) Interface Pin/Signal Descriptions (J5B)
Pin #
Signal
Description
1
DCD2*
Data Carrier Detect 2 – Indicates external serial communications device is
detecting a carrier signal (i.e., a communication channel is currently open). In
direct connect environments, this input will be driven by DTR2 as part of the
DTR/DSR handshake.
2
RXD2
Receive Data 2 – Serial port 2 receive data in
3
TXD2
Transmit Data 2 – Serial port 2 transmit data out
4
DTR2*
Data Terminal Ready 2 – Indicates Serial port 2 is powered, initialized, and ready.
Used as hardware handshake with DSR2 for overall readiness to communicate.
5
GND
Digital Ground
6
DSR2*
Data Set Ready 2 – Indicates external serial communications device is powered,
initialized, and ready. Used as hardware handshake with DTR2 for overall
readiness to communicate.
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.
8
CTS2*
Clear To Send 2 – Indicates external serial communications device is ready to
receive data. Used as hardware handshake with RTS2 for low level flow control.
9
RI2*
Ring Indicator 2 – Indicates external serial communications device is detecting a
ring condition. Used by software to initiate operations to answer and open the
communications channel.
Notes:
The shaded area denotes power or ground. The signals marked with * = Negative true logic.
Содержание ReadyBoard 700
Страница 1: ...ReadyBoard 700 Single Board Computer Reference Manual P N 5001722A Revision C ...
Страница 6: ...Contents vi Reference Manual ReadyBoard 700 ...
Страница 10: ...Chapter 1 About This Manual 4 Reference Manual ReadyBoard 700 ...
Страница 60: ...Chapter 3 Hardware 54 Reference Manual ReadyBoard 700 ...
Страница 78: ...Chapter 4 BIOS Setup 72 Reference Manual ReadyBoard 700 ...
Страница 80: ...Appendix A Technical Support 74 Reference Manual ReadyBoard 700 ...
Страница 88: ...Index 82 Reference Manual ReadyBoard 700 ...
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