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ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005
In Figure 3, DIP switch sections 6, 7, and 8 allow the computer to read Out A, Lock Detect , or Lock
Detect from the PLL device. Each of the inputs can only be read on one board at a time, but each item
could be read on a different board. In a three–board cascade, Out A could be read from the first board,
Out B from the second, and Lock Detect from the third. There is no way to determine the board address
of a particular input with software. The control program does not make use of these inputs; however,
source code could be modified as required. Pin assignment on the printer port connector is:
MC145220EVK
12
Freescale Semiconductor, Inc.
Single Board Operation
1
2
3
Closed
Open
Two- or Three-Board Cascade
Board A
1
2
3
Closed
Open
Board B
1
2
3
Closed
Open
Board C
1
2
3
Closed
Open
Figure 3. Switch Positions
Label
Out A
Out B
Lock Detect
For More Information On This Product,
Go to: www.freescale.com
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
Pin Number
12
13
15
MOTOROLA
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