m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 315
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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Quantity
Price
Part Number:
m37905F8CSP
Manufacturer:
MIT
Quantity:
20 000
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described below.
A-D CONVERTER
12.2 Block description
12.2 Block description
Figure 12.2.1 shows the block diagram of the A-D converter. Registers relevant to the A-D converter are
Fig. 12.2.1 Block diagram of A-D converter
12-4
AV
V
R EF
SS
0
1
approximation register
V
REF
Data bus (odd)
Successive
connection select bit
AN
AN
AN
AN
AN
AN
AN
AN
AN
AN
AN
AN
0
1
2
3
4
5
6
7
8
9
10
11
Resistor ladder
Control circuit
A-D register 0
A-D register 1
A-D register 2
A-D register 3
A-D register 4
A-D register 5
A-D register 6
A-D register 7
A-D register 8
A-D register 9
A-D register 10
A-D register 11
network
Data bus (even)
1
Comparator function select register 1
f
f
Comparator result register 1
1
2
V
ref
7905 Group User’s Manual Rev.1.0
Selection of A-D conversion frequency
Selector
1/ 2
Selector
Selector
Comparator result register 0
Comparator function select register 0
1/ 2
A-D conversion frequency (
select bits 1, 0
(1 ,0)
(0 ,1)
(0 ,0)
Decoder
(1 ,1)
A-D control register 1
A-D control register 0
A-D control register 2
AD
AD
)
Comparator
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