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<strong>3040</strong>-XX-UM<br />
<strong>ProDAQ</strong> <strong>3040</strong> 6U VME64x to C-Size VXI Adapter <strong>User</strong> <strong>Manual</strong><br />
The VME Control register contains the information, which address range on the VMEbus<br />
the accesses to the configured VXIbus address range should be mapped to. The VME<br />
Offset register determines the base address of the VMEbus address range.<br />
VXI Address A[23..16] A[15..0]<br />
compared with<br />
Offset register<br />
VMEbase reg.<br />
D[15..8]<br />
D[------]<br />
used for<br />
VME Address A[------] A[15..0]<br />
Figure 3 - VXIbus A24 to VMEbus A16 mapping<br />
Figure 3 shows the VXIbus A24 to VME A16 mapping. The only usable size of the mapped<br />
range is 64k due to the minimum memory space size in A24 as defined by the VXIbus<br />
standard.<br />
VXI Address A[31..16] A[15..0]<br />
compared with<br />
Offset register<br />
VMEbase reg.<br />
D[15..0]<br />
D[------]<br />
used for<br />
VME Address A[------] A[15..0]<br />
Figure 4 - VXIbus A32 to VMEbus A16 mapping<br />
Figure 4 shows the VXIbus A32 to VMEbus A16 mapping. As before, the only usable size<br />
of the mapped range is 64k due to the minimum memory space size as defined by the<br />
VXIbus standard.<br />
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Copyright, © 2002 <strong>Bustec</strong> Production Ltd.
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