user manual

EIA-530 Connections
http://www.motorola.com/computer/literature B-7
B
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.
23 DTR_B Data Terminal Ready (B). Output from DTE to DCE indicating that the DTE
is ready to send or receive data.
24 TxCO_A Transmit Signal Element Timing—DTE (A). Control signal that clocks
output data.
25 TM_A Test Mode (A). Indicates whether the local DCE is under test. In DTE
configuration, ignored. In DCE configuration, always tied inactive and driven
false.
Table B-4. MVME761 EIA-530 Interconnect Signals (Continued)
Pin
Number
Signal
Mnemonic
Signal Name and Description