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Hardware Preparation and Installation
MVME3100 Single Board Computer Installation and Use (6806800M28C)
27
1.4.3 Geographical Address Switch (S3)
The TSi148 VMEbus Status register provides the VMEbus geographical address of the
MVME3100. This switch reflects the inverted states of the geographical address signals.
Applications not using the 5-row backplane can use the geographical address switch to assign
a geographical address.
TRST SELECT 8 Normal MPC8540 TRST
mode where the board
HRESET will assert TRST.
Isolates the board
HRESET from TRST
and allows the board
to reset without
resetting the
MPC8540 JTAG/COP
interface.
This switch should
remain in the OFF
position unless a
MPC8540 emulator is
attached.
Table 1-2 Configuration Switch (S4) Settings (continued)
Switch Pos.
Setting
NotesOFF (Factory Default) ON
Figure 1-2 Geographical Address Switch Settings
16
Not used
PCI-X mode
GAP#=0
GA4#=0
GA3#=0
GA2#=0
GA1#=0
GA0#=0
1
2
3
4
5
6
7
8
1
16
Not used
PCI-X mode
GAP#=1
GA4#=1
GA3#=1
GA2#=1
GA1#=1
GA0#=1
1
2
3
4
5
6
7
8
1
ONON
Factory Default
Table 1-3 Geographical Address Switch Assignments
Position SW1 SW2
1
SW3 SW4 SW5 SW6 SW7 SW8
Function Not
Used
PCI Bus
A mode
GAP GA4 GA3 GA2 GA1 GA0