Speed Up/Down Switches And Run/Stop Switch; Run/Stop And General Purpose Switches - Motorola DSP56F801 Hardware User Manual

2.10 Speed Up/Down Switches and Run/Stop Switch

Two push-button switches are connected to form the Speed UP/DOWN logic via a set of
resistors to the A/D Port's signal AN6. The resistors create a voltage divider network
presenting unique voltage to the A/D port when each push button is pressed. A
RUN/STOP toggle switch is connected to A/D Port's signal AN7. Refer to
Figure 2-8. RUN/STOP and General Purpose Switches
+3.3V
10K
Speed UP
+3.3V
10K
5.1K
Speed DOWN
16K
+3.3V
10K
RUN/STOP SWITCH
10K
Technical Summary
Speed Up/Down Switches and Run/Stop Switch
DSP56F801
AN6
AN7
Figure 2-8.
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