m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 335

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

A-D CONVERTER
12.7 One-shot mode
Fig. 12.7.2 Initial setting example for related registers in one-shot mode (2)
12-24
Selection of comparator function
b7
Port P7, P8 direction register
b7
When comparator function is selected
A-D register i
(b15)
b0
b7
AN
AN
AN
AN
AN
AN
AN
AN
Comparator function select register 0
(Address DC
0
1
2
3
4
5
6
7
b0
Note: Writing to the following must be performed while the A-D converter
b7
Interrupt priority level
AN
AN
AN
AN
AN
AN
AN
AN
0 : Comparator function is not selected
1 : Comparator function is selected.
Port P7 direction register
(Address 11
0
1
2
3
4
5
6
7
halts (in other words, before a trigger is generated); this must be done
independent of the operation mode of the A-D converter.
• Each bit of the A-D control register 0, except writing of “0” to bit 6
• Each bit of the A-D control register 1
• Each bit of the A-D control register 2
• A-D register i (when the comparator function is selected)
• Comparator function select register 0
• Comparator function select register 1
Especially, when the V
an interval of 1 s or more must be elapsed before occurrence of a trigger.
16
Clear the bits, corresponding to the
selected analog input pins, to “0.”
Setting of A-D conversion start bit to “1.”
b7
)
1
16
(b 8)
Continued from preceding Figure 12.7.1.
0
b0 b7
)
7905 Group User’s Manual Rev.1.0
Operation starts.
b0
Trigger generated
REF
Interrupt priority level select bits
Set the level to one of 1 through 7 when using this interrupt
Set the level to 0 when disabling interrupts.
No interrupt requested
A-D conversion interrupt control register
(Address 70
connection select bit is cleared from “1” to “0,”
b0
A-D conversion start bit
A-D control register 0
(Address 1E
b7
16
)
b0
0 0
b7
A value (comparison value) in the range
from 00
A-D register 0 (Addresses 21
A-D register 1 (Addresses 23
A-D register 2 (Addresses 25
A-D register 3 (Addresses 27
A-D register 4 (Addresses 29
A-D register 5 (Addresses 2B
A-D register 6 (Addresses 2D
A-D register 7 (Addresses 2F
A-D register 8 (Addresses E1
A-D register 9 (Addresses E3
A-D register 10 (Addresses E5
A-D register 11 (Addresses E7
16
0
)
16
0
When comparator function is not selected
through FF
b0
16
b0
AN
AN
AN
AN
is set.
8
9
10
11
Port P8 direction register
(Address 14
Comparator function select register 1
(Address DD
AN
AN
AN
AN
8
9
10
11
Clear the bits, corresponding to the
selected analog input pins, to “0.”
16
16
16
16
16
16
16
16
16
16
16
16
0 : Comparator function is not selected
1 : Comparator function is selected.
, 20
, 22
, 24
, 26
, 28
, 2E
, 2A
, 2C
, E0
, E2
, E4
, E6
16
16
16
16
16
16
16
16
16
16
16
16
16
)
)
)
)
)
16
)
)
)
)
)
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)
)
)