m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 229

• 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 2.9.6. Operation timing of one-shot mode, with an external trigger selected
2.9.3 Operation of A/D Converter (in one-shot mode, an external trigger selected)
In one-shot mode, choose functions from those listed in Table 2.9.3. Operations of the circled items are
described below. Figure 2.9.6 shows timing chart, and Figure 2.9.7 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
A D r e g i s t e r i
A / D c o n v e r s i o n
i n t e r r u p t r e q u e s t
A D
T R G
Table 2.9.3. Choosed functions
(1) If the level of the AD
(2) After A/D conversion is completed, the content of the successive comparison register (con-
(3) If the level of the AD
Sample & Hold
N o t e : W h e n
Operation clock
Resolution
Analog input pin
Trigger for starting
A/D conversion
AD
the A/D converter begins operating.
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 converter stops operating.
from step (1) again. If the level of the AD
in progress, the A/D converter stops the A/D conversion in process, and carries out conver-
sion from step (1) again.
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
Item
“ H ”
page 220 of 354
“ 1 ”
“ 0 ”
“ L ”
“ 1 ”
“ 0 ”
A D
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
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
___________
___________
( 1 ) S t a r t A / D c o n v e r s i o n
Divided-by-4 f
by-3 f
8-bit / 10-bit
One of AN
Software trigger
Trigger by AD
Activated
TRG
Not activated
TRG
S e t t o “ 1 ” b y s o f t w a r e
8 - b i t r e s o l u t i o n : 2 8
1 0 - b i t r e s o l u t i o n : 3 3
AD
pin changes from “H” to “L”, the A/D converter carries out conversion
changes from “H” to “L” with the A/D conversion start flag set to “1”,
/ divided-by-2 f
Set-up
0
pin to AN
AD
TRG
Z
, 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 .
/ divided-
A D
7
pin
___________
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
AD
A D
A D
/ f
TRG
c y c l e s
c y c l e s
AD
pin changes from “H” to “L” while conversion is
(2) A/D conversion is
complete
R e s u l t
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 .
(3) Start A/D
conversion
2. A/D Converter