M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 415

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

400
A-D Converter
Operation
Figure 2.7.17. Operation timing of repeat sweep 0 mode
2.7.8 Operation of A-D Converter (in repeat sweep mode 0)
A-D
conversion
start flag
A-D register 0
A-D register 1
A-D register i
AD
In repeat sweep 0 mode, choose functions from those listed in Table 2.7.8. Operations of the circled items
are described below. Figure 2.7.17 shows timing chart, and Figure 2.7.18 shows the set-up procedure.
Table 2.7.8. Choosed functions
(1) Setting the A-D conversion start flag to “1” causes the A-D converter to start the conversion
(2) After the A-D conversion of voltage input to the AN
(3) The A-D converter converts all pins selected by the user. The conversion result is transmitted
(4) The A-D converter continues operating until the A-D conversion start flag is set to “0” by
“1”
“0”
Operation clock
Resolution
Analog input pin
on voltage input to the AN
successive comparison register (conversion result) is transmitted to A-D register 0.
to A-D register i corresponding to each pin every time A-D conversion on the pin is com-
pleted. The A-D conversion interrupt request bit does not go to “1”.
software.
(1) Start A-D conversion
Set to “1” by software.
Note: When
Item
8-bit resolution : 28
10-bit resolution : 33
Conversion rate per analog input pin is 49
AD
AD
frequency is less than 1MH
O
O
O
AD
AN
to AN
(6 pins) / AN
Divided-by-4 f
by-2 f
8-bit / 10-bit
AD
cycles
cycles
0
and AN
3
AD
0
(4 pins) / AN
Set-up
/ f
pin.
(2) AN1 conversion begins after AN0
AD
1
0
conversion is complete
(2 pins) / AN
AD
to AN
8-bit resolution : 28
10-bit resolution : 33
Z
Result
, sample and hold function cannot be selected.
/ divided-
0
7
AD
to AN
(8 pins)
cycles for 8-bit resolution and 59
0
5
Trigger for starting
A-D conversion
Sample & Hold
Expanded analog
input pin
AD
AD
cycles
cycles
Item
0
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(3) Consecutive conversion
pin is completed, the content of the
Result
AD
O
O
O
cycles for 10-bit resolution.
Cleared to “0” by software
Software trigger
Trigger by AD
External ope-amp
connection mode
Not activated
Activated
Not used
Mitsubishi microcomputers
M16C / 62 Group
Result
Set-up
(4)
A-D conversion
is complete
TRG