m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 227

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Operation
Figure 2.9.4. Operation timing of one-shot mode
2.9.2 Operation of A/D converter (one-shot mode)
In one-shot mode, choose functions from those listed in Table 2.9.2. Operations of the circled items are
described below. Figure 2.9.4 shows the operation timing, and Figure 2.9.5 shows the set-up procedure.
A / D c o n v e r s i o n
s t a r t f l a g
A D r e g i s t e r i
A/D conversion
interrupt request
A D
N o t e : W h e n
(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-
Table 2.9.2. Choosed functions
C o n v e r s i o n r a t e p e r a n a l o g i n p u t p i n i s 4 9
Sample & Hold
Operation clock
Analog input pin
Trigger for starting
A/D conversion
Resolution
AD
version result) is transmitted to AD 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”
A D
Item
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f r e q u e n c y i s l e s s t h a n 1 M H
O
O
O
O
O
(1) Start A/D conversion
C l e a r e d t o “ 0 ” w h e n i n t e r r u p t r e q u e s t i s a c c e p t e d , o r c l e a r e d b y s o f t w a r e
Divided-by-4 f
by-3 f
Set to “1” by software
One of AN
Software trigger
Trigger by AD
8-bit / 10-bit
Not activated
Activated
AD
8-bit resolution : 28
10-bit resolution : 33
/ divided-by-2 f
Set-up
Z
0
, s a m p l e a n d h o l d f u n c t i o n c a n n o t b e s e l e c t e d .
pin to AN
AD
TRG
A D
/ divided-
c y c l e s f o r 8 - b i t r e s o l u t i o n a n d 5 9
7
pin
AD
/ f
AD
AD
AD
cycles
cycles
( 2 ) A / D c o n v e r s i o n i s c o m p l e t e
A D
c y c l e s f o r 1 0 - b i t r e s o l u t i o n .
R e s u l t
2. A/D Converter