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SROM Initialization Enable Switch (S5-2) Hardware Preparation and Installation
MVME55006E Single-Board Computer Installation and Use (6806800A37D)
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1.6.7 SROM Initialization Enable Switch (S5-2)
This switch enables/disables the GT-64260B SROM initialization. When set to 2, it enables the
GT-64260B device initialization via I2C SROM. Set to ON disables this initialization sequence.
1.6.8 PCI Bus 0.0 Speed Switch (S4-1)
This switch can force PCI bus 0.0 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. Set to 1, it allows the
PMC board to choose the PCI 0.0 bus speed. Set to ON forces PCI bus 0.0 to run at 33 MHz.
Figure 1-9 S5-2 Settings
Enable SROM initialization
Disable SROM initialization
(factory configuration)
1
ON
1
ON
2
2
S5-2
Figure 1-10 S4-1 Settings
PMC board controls
(factory configuration)
Force PCI bus 0.0
PCI 0.0 bus speed
to run at 33 MHz
1
ON
1
ON
2
2
S4-1