Xycom XVME-400 Manual page 22

XVME-400/401/490/491 Manual
October, 1989
On the XVME-400/401, connector JKl carries the signals for Channels 0 and 2, while
connector JK2 carries the signals for Channels 1 and 3. On the XVME-490/491, the signals
for all four channels are carried on connector P2. All channels on all modules are
configured as DTE.
Sources of JKl /JK2. or P2 Connector
TXD/SD SCC output pin TXD drives a line driver. Driver output is sent to this pin.
RTS/RS SCC output pin RTS* drives a line driver. Driver output is sent to this pin.
TXC/TT SCC output pin TRXC drives a line driver. Driver output is sent to this pin.
DTR/TR SCC output pin DTR* drives a line driver. Driver output is sent to this pin.
The RS232C signal names (XVME-400/490) are given to the left of
the slash, and the RS-485/422A
(XVME-40l/491).
All line drivers invert the signal. For modem control lines,
SCC writer register bit will cause the output to be asserted. For TXD/SD and TXC/TT,
the polarity defined by RS-232C or RS-485 is provided.
Destinations of JKl /JK2. or P2 Connector
RXD/RD This input pin is buffered by a line receiver and is driven to the SCC input pin
RXD.
CTS/CS This input pin is buffered by a line receiver and is driven to the SCC input pin
CTS*.
RXC/RT This input pin is buffered by a line receiver and is driven to the SCC input pin
RTXC.
DCD/RR This input pin is buffered by a line receiver and is driven to the SCC input pin
DCD*.
All line receivers invert the signal. For modem control lines, a 1 will be read from the
appropriate SCC read control register bit when the input is asserted. For RXD/RD and
RXC/RT, the polarity defined by RS-232C or RS-485 is provided.
Signals
Output
NOTE
signal names to the right
Signals (one set for each serial channel)
Input
2-11
(one set for each serial channel)
writing a 1 to the appropriate