m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 337
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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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repeatedly.
address 1E
operation while the A-D conversion start bit = “1.”
A-D CONVERTER
12.8 Repeat mode
12.8 Repeat mode
In the repeat mode, the A-D conversion for an input voltage from one selected analog input pin is performed
In this mode, no A-D conversion interrupt request occurs. Additionally, the A-D conversion start bit (bit 6 at
This mode can be used with analog input pin AN
Fig. 12.8.1 Initial setting example for related registers in repeat mode (1)
12-26
12.8.1 Settings for repeat mode
Figures 12.8.1 and 12.8.2 show initial setting examples for related registers in the repeat mode.
16
) remains set to “1” until it is cleared to “0” by software, and the A-D converter repeats its
b7
b7
b7
A-D control registers 0, 1, and 2
0 0 0
0
0
0
0
0 1
0
7905 Group User’s Manual Rev.1.0
0
Continued on Figure 12.8.2.
b0
b0
b0
A-D conversion frequency (
A-D conversion start bit
Repeat mode
b2
0 0 0 : AN
0 0 1 : AN
0 1 0 : AN
0 1 1 : AN
1 0 0 : AN
1 0 1 : AN
1 1 0 : AN
1 1 1 : AN
Analog input pin select bits 0
A-D control register 2
(Address DB
Analog input pin select bits 1
A-D control register 0
(Address 1E
b3
See Table 12.2.1.
0 : A-D conversion halts.
A-D conversion frequency (
V
b1 b0
A-D control register 1
(Address 1F
Resolution select bit
0 X X X : AN
1 0 0 0 : AN
1 0 0 1 : AN
1 0 1 0 : AN
1 0 1 1 : AN
1 1 0 0 : Do not select.
1 1 1 1 : Do not select.
REF
b2
See Table 12.2.1.
0 : 8-bit resolution mod
1 : 10-bit resolution mode
0 : Pin V
i
b1 b0
connection select bit
(i = 0 to 11).
0
1
2
3
4
5
6
7
selected
selected
selected
selected
selected
selected
selected
selected
REF
0
8
9
10
11
16
16
: It may be either “0” or “1.”
to AN
selected
selected
16
selected
selected
connected
)
)
)
7
selected
AD
AD
) select bit 0
) select bit 1
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