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Figure 13.5-2 Outline of phase difference count mode (at frequency multiplied by 4) operation
AIN pin
BIN pin
+1
+1 +1
+1
Count value 0
1
2
3
4
In counting the encoder output, the input condition must be arranged by defining the relationship
between the phases and pins shown below. Thus, high-precision detection can enable the
rotation angle, rotation count, and rotation direction to be measured.
•
Inputting phase A to the AIN pin
•
Inputting phase B to the BIN pin
•
Inputting phase Z to the ZIN pin
If this count mode is selected, the selection of detection edge via CCRH: CES1/0 and CCRL:
CGE1/0 is disabled.
CHAPTER 13 8/16-BIT UP/DOWN COUNTER/TIMER
+1
+1
+1
+1
+1
+1
-1
5
6
7
8
9
10
9
+1
-1
-1
-1
-1
-1
10
9
8 7
6 5
-1 -1
-1 -1
4
3
2
1
279
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