Emerson MVME7100 manual Geographical Address Switch, S2, VME System Controller Select, S2

Geographical Address Switch, S2 Hardware Preparation and Installation

2.4.1.7Master WP

The Master Write Protect (WP) switch is OFF for normal operation. When this switch is ON, writes to the NOR Flash, NAND Flash, MRAM and I2C EEPROMs are disabled. When the switch is OFF, writes to the non-volatile devices may be allowed depending on other switches and control bits.

2.4.2Geographical Address Switch, S2

The Tsi148 VMEbus Status Register provides the VMEbus geographical address of the MVME7100. Applications not using the 5-row backplane can use the geographical address switch to assign a geographical address per the following diagram. More information regarding GA address switch assignments can be found in the MVME7100 Single Board Computer Programmer’s Reference.

Figure 2-5 Geographical Address Switch Position

2.4.3VME System Controller Select, S2

Positions 1 and 2 of S2 are used to select VME System Controller selection. The default is for automatic determination of SYSCON.

Table 2-6 VME System Controller and GA Switch Settings

	Position	Function	Default
	S2-1	VME SCON Auto1	Auto-SCON
	S2-2	VME SCON SEL2	Non-SCON
	S2-3	GAP	1
	S2-4	GA4	1
	S2-5	GA3	1
	S2-6	GA2	1
	S2-7	GA1	1
MVME7100 Single Board Computer Installation and Use (6806800E08A)				39