Vme Scon Select Header (J27); Pci Bus 1.0 Speed Header (J29); Table 5-32. Vme Scon Select Header (J27) Pin Assignments; Table 5-33. Pci Bus 1.0 Speed Header (J25) Pin Assignments - Motorola MVME5500 Installation And Use Manual

Pin Assignments

VME SCON Select Header (J27)

5

PCI Bus 1.0 Speed Header (J29)

5-44
A 3-pin 2 mm 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. The pin
assignments for this header are as follows:
Table 5-32. VME SCON Select Header (J27) Pin
A 2-pin 2 mm planar header provides the capability to force PCI Bus 1.0
to run at 33 MHz rather than allowing the PMC to control the bus to run at
33 or 66 MHz. No jumper installed allows the PMC to choose the PCI Bus
1.0 speed. A jumper installed across pins 1-2 forces PCI Bus 1.0 to run at
33 MHz.The pin assignments for this header are as follows:
Table 5-33. PCI Bus 1.0 Speed Header (J25) Pin
Assignments
Pin Signal
1 No SCON
2 SCON
3 Auto-SCON
Assignments
Pin Signal
1 P1_M66EN
2 GND
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