M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 403

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

388
A-D Converter
Operation
Figure 2.7.5. Operation timing of one-shot mode
2.7.2 Operation of A-D converter (one-shot mode)
In one-shot mode, choose functions from those listed in Table 2.7.2. Operations of the circled items are
described below. Figure 2.7.5 shows the operation timing, and Figure 2.7.6 shows the set-up procedure.
A-D conversion
start flag
A-D conversion
interrupt request
A-D register i
AD
Note: When
Table 2.7.2. Choosed functions
(1) Setting the A-D conversion start flag to “1” causes the A-D converter to begin operating.
(2) After A-D conversion is completed, the content of the successive comparison register (con-
Conversion rate per analog input pin is 49
Analog input pin
Trigger for starting
A-D conversion
Operation clock
Resolution
AD
version result) is transmitted to A-D register i. At this time, the A-D conversion interrupt re-
quest bit goes to “1”. Also, the A-D conversion start flag goes to “0”, and the A-D converter
stops operating.
“1”
“0”
“1”
“0”
AD
Item
frequency is less than 1MH
O
O
O
O
(1) Start A-D conversion
Cleared to “0” when interrupt request is accepted, or cleared by software
Set to “1” by software
Software trigger
Trigger by AD
Divided-by-4 f
by-2 f
8-bit / 10-bit
One of AN
8-bit resolution : 28
10-bit resolution : 33
AD
Set-up
/ f
Z
AD
0
, sample and hold function cannot be selected.
pin to AN
TRG
AD
AD
/ divided-
cycles for 8-bit resolution and 59
7
pin
AD
AD
cycles
cycles
Sample & Hold
Expanded analog
input pin
Item
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(2) A-D conversion is complete
AD
cycles for 10-bit resolution.
O
O
Result
Not used
Either ANEX0 pin or
ANEX1 pin
External operation amplifier
connection mode
Not activated
Activated
Mitsubishi microcomputers
M16C / 62 Group
Set-up