ESD VME-DIO32-L, Hardware Manual

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Hardware
Page 14 of 22
Hardware Manual Doc. Nr.: M.1607.27 / Rev. 1.0
VME-DIO32-L
Permissible Positions of AM2 and AM2E
Switch SW130
Meaning
Position 1 2 -
Address bit
Modifier
AM2E AM2
-
Address bit 1 X
AM2 = Don’t care
Address bit 0 1 AM2 = 1 (supervisory modes only)
Address bit 0 0 AM2 = 0 (non-privileged modes only)
Table 4: VME permissible positions of AM2 and AM2E
Address Modifier Combinations for A24 Accesses are recommended as follows:
The
modifiers AM3, AM4 and AM5 are always ‘1’.
Switch
Modifier
AM3-AM5
SW130
Result
[Hex]
Meaning
Position - - - 1 2 3 4 - -
Address bit
Modifier
AM5 AM4 AM3 AM2E AM2 AM1 AM0 - -
Address bit 1 1 1 1
1 0 1 3D
h
Standard supervisory data access OR
0 0 1
39
h
Standard non-privileged data access
Address bit 1 1 1 0
1 0 1
3D
h
Standard supervisory data access
0 0 1
39
h
Standard non-privileged data access
Table 5: Recommended access modes for standard accesses (A24)