M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 411

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

396
A-D Converter
Figure 2.7.13. Operation timing of repeat mode
Operation
2.7.6 Operation of A-D Converter (in repeat mode)
In repeat mode, choose functions from those listed in Table 2.7.6. Operations of the circled items are
described below. Figure 2.7.13 shows timing chart, and Figure 2.7.14 shows the set-up procedure.
A-D conversion
start flag
A-D register i
A-D conversion
AD
Table 2.7.6. Choosed functions
(1) Setting the A-D conversion start flag to “1” causes the A-D converter to start operating.
(2) After the first conversion is completed, the content of the successive comparison register
(3) The A-D converter continues operating until the A-D conversion start flag is set to “0” by
Operation clock
Resolution
Analog input pin
Trigger for starting
A-D conversion
AD
(conversion result) is transmitted to A-D register i. The A-D conversion interrupt request bit
does not go to “1”.
software. The conversion result is transmitted to A-D register i every time a conversion is
completed.
Note: When
“1”
“0”
Item
Stop
Conversion rate per analog input pin is 49
for 10-bit resolution.
(1) Start A-D conversion
AD
Set to “1” by software
8-bit resolution : 28
10-bit resolution : 33
frequency is less than 1MHz, sample and hold function cannot be selected.
O
O
O
O
Divided-by-4 f
by-2 f
8-bit / 10-bit
One of AN
Software trigger
Trigger by AD
Convert
AD
/ f
AD
Set-up
AD
0
AD
pin to AN
cycles
cycles
AD
TRG
/ divided-
7
pin
(2) Conversion result is transferred to the A-D register
AD
8-bit resolution : 28
10-bit resolution : 33
cycles for 8-bit resolution and 59
Result
Sample & Hold
Expanded analog
input pin
Cleared to “0” by software
Convert
Item
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
AD
AD
cycles
cycles
O
O
Not used
External operation amplifier
connection mode
Not activated
Either ANEX0 pin or
ANEX1 pin
Activated
Convert
AD
cycles
Result
Mitsubishi microcomputers
M16C / 62 Group
(3) A-D conversion
Set-up
Stop
is complete