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7733 Datasheet(PDF) 277 Page - Renesas Technology Corp

Part # 7733
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 Datasheet(HTML) 277 Page - Renesas Technology Corp

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A-D CONVERTER
7733 Group User’s Manual
9–12
1
1
n9
0 00000000
0 00000000
1 00000000
n9 n8 1 0000000
n9 n8 n7 n6 n5 n4 n3
1
n9 n8 n7 n6 n5 n4 n3 n2
b9
b0
1st comparison result
2nd comparison result
Successive approximation register
Vref
A-D converter stopped
1st comparison
2nd comparison
3rd comparison
10th comparison
Conversion complete
2
VREF
2048
VREF
2
VREF
4
VREF
2048
VREF
2
VREF
4
VREF
8
VREF
2048
VREF
2
VREF
4
VREF
8
VREF
VREF
1024
2048
VREF
[V]
[V]
[V]
[V]
[V]
4
VREF
•When n9 = 1,
4
VREF
•When n9 = 0,
8
VREF
•When n8 = 1,
8
VREF
•When n8 = 0,
2
VREF ±
–
–
±±
–
±±
±
±
–
n2 n1
n1 n0
+
–
+
–
1
1
n9
0 00000000
0 00000000
1 00000000
n9 n8 1 0000000
n9 n8 n7 n6 n5 n4 n3 1 00
n9 n8 n7 n6 n5 n4 n3 n2 00
b9
b0
1st comparison result
2nd comparison result
Successive approximation register
Vref
A-D converter stopped
1st comparison
2nd comparison
3rd comparison
8th comparison
Conversion complete
2
VREF
2048
VREF
2
VREF
4
VREF
2048
VREF
2
VREF
4
VREF
8
VREF
2048
VREF
2
VREF
4
VREF
8
VREF
VREF
256
2048
VREF
[V]
[V]
[V]
[V]
[V]
4
VREF
•When n9 = 1,
4
VREF
•When n9 = 0,
8
VREF
•When n8 = 1,
8
VREF
•When n8 = 0,
2
VREF ±
–
–
±±
–
±±
±
±
–
+
–
+
–
Table 9.3.2 Change of successive approximation register and Vref during A-D conversion (when
resolution = 8 bits)
9.3 A-D conversion method
Table 9.3.3 Change of successive approximation register and Vref during A-D conversion (when
resolution = 10 bits)



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