Hardware, Installation and Configuration
2-13
The signals
EXT_CLKIN
and
EXT_CLKOUT
are used for external 10MHz clocks in or out. An
external clock driving the RCIM III should be capable of driving a 5V TTL signal into a
50 ohm load. The RCIM III will automatically switch to using the external clock if one is
present. The external clock output from the RCIM III is driven using a
74ABT16240
line
driver.
The signals
EXT_RXD1
,
EXT_TXD1
,
EXT_RXD2
, and
EXT_TXD2
are RS-232 level signals.
They are currently used for debug purposes.
System Identification
1
The following output to
lspci(8)
shows the PCI class, vendor and device IDs for the
RCIM III (0e:04.0 (
bus
:
slot
.
function
) will differ on your system):
#
lspci -v | grep -i rcim
0e:04.0 System peripheral: Concurrent Real-Time, Inc. RCIM III Real-
Time Clock & Interrupt Module (PCIe) (rev 01)
#
lspci -ns 0e:04.0
0e:04.0 Class 0880: 1542:9271 (rev 01)
Daisy Chain Cable
1
The RCIM III uses a fiber optic serial synchronization cable with SFP (small form-factor
pluggable) connectors (part no. HS002-3CBL-xx) to connect RCIM IIIs in an RCIM
chain. The serial data on the cable includes parity and framing information which allow
cable problems to be detected. Polling is done continuously and messages that report the
status of the RCIM III daisy chain cables are output when an error condition is detected.
Messages indicating problems will appear on the systems directly connected by a failing
link.
The serial cables are point to point connections. The “input” cable refers to the cable going
upstream towards the master RCIM. The “output” cable is the downstream connection
away from the master.
RCIM: Input cable disconnected.
RCIM: Input cable connected.
RCIM: Input cable connected but not synchronized.
RCIM: Input cable unsynchronized.
RCIM: Input cable O.K.
RCIM: Output cable disconnected.
RCIM: Output cable connected.
RCIM: Output cable connected but not synchronized.
RCIM: Output cable unsynchronized.
RCIM: Output cable O.K.
RCIM: Cable error on input cable.
RCIM: Cable error on output cable.
The “disconnected” and “connected” messages will only occur based on whether an SFP
is installed in the appropriate cage of the RCIM III.
They will not occur when the optical cable is inserted or removed. They should not occur
during normal operation unless the SFP is not installed correctly or it is malfunctioning.
Summary of Contents for RCIM
Page 1: ...Real Time Clock and Interrupt Module RCIM User s Guide 0898007 1000 March 2021...
Page 10: ...RCIM User s Guide 1 4...
Page 32: ...RCIM User s Guide 2 22...
Page 80: ...RCIM User s Guide A 28...
Page 102: ...RCIM User s Guide C 2...
