Emerson MVME55006E manual Srom Initialization Enable Switch S5-2, PCI Bus 0.0 Speed Switch S4-1

SROM Initialization Enable Switch (S5-2) Hardware Preparation and Installation

1.6.7SROM 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.

Figure 1-9	S5-2 Settings
		S5-2
1		ON	1	ON
2			2
Enable SROM initialization			Disable SROM initialization
			(factory configuration)

1.6.8PCI 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 1-10 S4-1 Settings

		S4-1
1	ON	1
2		2

ON

PMC board controls	Force PCI bus 0.0
PCI 0.0 bus speed
	to run at 33 MHz
(factory configuration)

MVME55006E Single-Board Computer Installation and Use (6806800A37D) 25