m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 334

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

once, and an A-D conversion interrupt request occurs at completion of the operation.
12.7 One-shot mode
In the one-shot mode, the operation for an input voltage from one selected analog input pin is performed
This mode can be used with analog input pin AN
Fig. 12.7.1 Initial setting example for related registers in one-shot mode (1)
12.7.1 Settings for one-shot mode
Figures 12.7.1 and 12.7.2 show initial setting examples for related registers in the one-shot mode.
When using an interrupt, it is necessary to set the related registers to enable an interrupt. Refer to
“CHAPTER 6. INTERRUPTS” for more details.
b7
b7
b7
A-D control registers 0, 1, and 2
0 0
0
0
0
0
0
0 0
0
7905 Group User’s Manual Rev.1.0
0
Continued on Figure 12.7.2.
b0
b0
b0
A-D conversion frequency (
Analog input pin select bits 0
A-D conversion start bit
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
One-shot mode
Analog input pin select bits 1
0 : A-D conversion halts.
A-D control register 1
(Address 1F
b3
See Table 12.2.1.
A-D control register 2
(Address DB
Resolution select bit
V
A-D conversion frequency (
b1 b0
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.
i
REF
0 : 8-bit resolution mod
1 : 10-bit resolution mode
b2
See Table 12.2.1.
0 : Pin V
(i = 0 to 11).
b1 b0
connection select bit
A-D control register 0
(Address 1E
0
1
2
3
4
5
6
7
selected
selected
selected
selected
selected
selected
selected
selected
REF
0
8
9
10
11
16
: It may be either “0” or “1.”
to AN
selected
selected
16
selected
selected
connected
)
)
7
16
selected
)
AD
) select bit 0
AD
) select bit 1
A-D CONVERTER
12.7 One-shot mode
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