m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 349

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

12.11 Repeat sweep mode 1
A-D CONVERTER
12-38
Fig. 12.11.3 Initial setting example for related registers in repeat sweep mode 1 (2)
When comparator function is selected
(b 15)
A-D register j
b7
Note: Writing to the following must be performed while the A-D converter
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 wrinting 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 j (when the comparator function is selected)
• Comparator function select register 0
Especially, when the V
an interval of 1 s or more must be elapsed before occurrence of a trigger.
Port P7 direction register
b7
Setting of A-D conversion start bit to “1.”
b7
1
Continued from preceding Figure 12.11.2.
(b 8)
b0 b7
7905 Group User’s Manual Rev.1.0
REF
Operation starts.
Trigger generated
connection select bit is cleared from “1” to “0,”
b0
b0
AN
AN
AN
AN
AN
AN
AN
AN
A-D conversion start bit
A-D control register 0
(Address 1E
Port P7 direction register
(Address 11
0
1
2
3
4
5
6
7
Clear the bits, corresponding to the
selected analog input pins, to “0.”
b0
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
16
16
)
)
16
through FF
When comparator function is not selected
16
is set.
16
16
16
16
16
16
16
16
, 20
, 22
, 24
, 26
, 28
, 2E
, 2A
, 2C
16
16
16
16
16
16
16
16
)
)
)
)
)
)
)
)