XVME-6500
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 17 -
http://www.acromag.com
- 17 -
www.acromag.com
3.1.2 Core Configuration Switch SW2
Table 3.1.b summarizes the functions, settings, and descriptions for dip
switches SW2-1 thru SW2-4.
Table 3.1.b: Core Configuration Switch SW2
Core Configuration Switch SW2
Position
Function
Switch Setting
Description
1
PMC Bus Speed
Override
OFF
100/50/25MHz
ON (default)
133/66/33MHz
2
XMC Select
Override
OFF (default)
Upper Site XMC/PMC Auto-
Detect
ON
Upper Site Force XMC
3:4
Monitor
Auto-Detect
Override
OFF:OFF
Force Rear VGA Port Enable
OFF:ON
Force Front VGA Port Enable
ON:OFF
(default)
VGA Port Auto-Detect
ON:ON
Force Front VGA port Enable
SW2-1 is used to override the automatic selection of the PMC bus speed.
When the switch is on the bus speed is automatically selected at
133/66/33MHz. When the switch is off the speed is overridden as follows:
133MHz normal bus speed will slow down to 100MHz
66MHz normal bus speed will slow down to 50MHz
33MHz normal bus speed will slow down to 25MHz
Note that with two 133MHz PMC modules installed there may be instability
unless the bus speed is slowed down to 100MHz, as recommended by VITA 39.
SW2-2 is used to override the automatic detection of PMC/XMC modules in
the upper PMC/XMC site. If an installed XMC module is not automatically
recognized, closing this switch will turn off the PMC bridge and force the
connection to the XMC card instead of the bridge.
SW2-3 and 2-4 are used to override the automatic VGA monitor detection on
the VGA ports. If a monitor connected to a port is not automatically
recognized, setting the switches as shown will force a particular VGA port to be
active.
