User guide

Appendix B
Number Systems, Hex Mask
B–6
Bits of the mask word that are set (1) pass data from a source to a
destination. Reset bits (0) do not. In the example below, data in bits 0–7 of
the source word is passed to the destination word. Data in bits 8–15 of the
source word is not passed to the destination word. Destination bits 8–15 are
not affected (they are left in their last state).
1110 0101 1100 0110
Source Word
0000 0000
1111 1111
Mask Word
0000 0000
1100 0110
Destination Word
(all bits 0 initially)