VME SCON Select Header (J27)
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VME SCON Select Header (J27)
A 3-pin planar header allows the choice for auto/enable/disable SCON
VME configuration. A jumper installed across pins 1-2 configures for
SCON disabled. A jumper installed across pins 2-3 configures for auto
SCON. No jumper installed configures for SCON always enabled.
PCI Bus 1.0 Speed Header (J29)
A 2-pin planar header that can force PCI bus 1.0 to run at 33 MHz rather
than the standard method of allowing the PMC board to control whether
the bus runs at 33 MHz or 66 MHz. No jumper installed allows the PMC
board to choose the PCI 1.0 bus speed. A jumper installed across pins 1-2
forces PCI bus 1.0 to run at 33 MHz.
J27
1
2
3
1
2
3
Always SCON
J27
J27
1
2
3
(factory configuration)
No SCON
Auto-SCON
1
2
PMC board controls
J29
(factory configuration)
1
2
J29
Force PCI bus 1.0
PCI 1.0 bus speed
to run at 33 MHz