EIA-530 Connections
MVME162/D2 A-5
A
4RTS_ARequest to Send (A). Output from DTE to DCE when required to transmit
a message.
5CTS_AClear to Send (A). Input to DTE from DCE to indicate that message
transmission can begin.
6DSR_AData Set Ready (A). Input to DTE from DCE to indicate that the DCE is
ready to send or receive data. In DCE configuration, always true.
7SIG GNDSignal Ground. Common return line for all signals.
8DCD_AData Carrier Detect (A). Receive line signal detector output from DCE to
DTE to indicate that valid data is being transferred to the DTE on the RxD
line.
9RxC_BReceive Signal Element Timing—DCE (B). Control signal that clocks
input data.
10 DCD_B Data Carrier Detect (B). Receive line signal detector output from DCE to
DTE to indicate that valid data is being transferred to the DTE on the RxD
line.
11 TxCO_B Transmit Signal Element Timing—DTE (B). Control signal that clocks
output data.
12 TxC_B Transmit Signal Element Timing—DCE (B). Control signal that clocks
input data.
13 CTS_B Clear to Send (B). Input to DTE from DCE to indicate that message
transmission can begin.
14 TxD_B Transmit Data (B). Data to be transmitted; output from DTE to DCE.
15 TxC_A Transmit Signal Element Timing—DCE (A). Control signal that clocks
input data.
16 RxD_B Receive Data (B). Data which is demodulated from the receive line; input
from DCE to DTE.
17 RxC_A Receive Signal Element Timing—DCE (A). Control signal that clocks
input data.
18 RTS_B Request to Send (B). Output from DTE to DCE when required to transmit
a message.
19 LL_A Local Loopback (A). Reroutes signal within local DCE. In DTE
configuration, always tied inactive and driven false. In DCE
configuration, ignored
20 DTR_A Data Terminal Ready (A). Output from DTE to DCE indicating that the
DTE is ready to send or receive data.
21 RL_A Remote Loopback (A). Reroutes signal within remote DCE. In DTE
configuration, always tied inactive and driven false. In DCE
configuration, ignored.
22 DSR_B Data Set Ready (B). Input to DTE from DCE to indicate that the DCE is
ready to send or receive data. In DCE configuration, always true.
Table A-4. Serial Port B EIA-530 Interconnect Signals (Continued)
Pin
Number
Signal
Mnemonic
Signal Name and Description
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