Chapter 3 - Installing Instrument Boards
69
A9 A8 A7 A6 A5 A4
1 1
0 0 0 0
The final address in the range is 307H, which in binary
becomes 11,0000,0111 (ignoring A0-A3):
A9 A8 A7 A6 A5 A4
1 1
0 0 0 0
So A4EN does not have to be set to OFF.
2. Set the offset address.
The offset address is set to zero, so set A10-A15 to zero (on).
3. Set the address mask.
Since there is no change in A4 and A10-A12, the default
address mask does not need changing, even though A10-A12
can be set to zero. Thus the final SW2 and SW1 settings are:
On
On On
On
Off Off
On
On
On
On
On
On
On
ADDRESS
MASK
OFFSET ADDRESS
BASE ADDRESS
ENABLE
DISABLE
SW2
SW1
0
1
Off
Off
On
Figure 3-5: Example 1 address switches
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