m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 233

• 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
Figure 2.9.10. Operation timing of single sweep mode
Operation (1) Setting the A/D conversion start flag to “1” causes the A/D converter to start the conversion on
2.9.5 Operation of A/D Converter (in single sweep mode)
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 0
A D r e g i s t e r 1
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
b i t
In single sweep mode, choose functions from those listed in Table 2.9.5. Operations of the circled items
are described below. Figure 2.9.10 shows timing chart, and Figure 2.9.11 shows the set-up procedure.
A D
Table 2.9.5. Choosed functions
(2) After the A/D conversion of voltage input to the AN
(3) When the A/D conversion on all the analog input pins selected is completed, the A/D conver-
O p e r a t i o n c l o c k
R e s o l u t i o n
Analog input pin
“ 1 ”
“ 0 ”
voltage input to the AN
successive comparison register (conversion result) is transmitted to AD register 0. The A/D
converter converts all analog input pins selected by the user. The conversion result is trans-
mitted to AD register i corresponding to each pin, every time conversion on one pin is com-
pleted.
sion interrupt request bit goes to “1”. At this time, the A/D conversion start flag goes to “0”.
The A/D converter stops operating.
“ 1 ”
“ 0 ”
N o t e : W h e n
( 1 ) S t a r t A / D c o n v e r s i o n
I t e m
page 224 of 354
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
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
S e t t o “ 1 ” b y s o f t w a r e
A D
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
Divided-by-4 f
by-3 f
/ f
8 - b i t / 1 0 - b i t
A N
t o A N
( 6 p i n s ) / A N
A D
A D
AD
c y c l e s
0
0
c y c l e s
a n d A N
AD
3
pin.
( 4 p i n s ) / A N
Set-up
/ divided-by-2 f
( 2 )
1
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
After A/D conversion on AN
A/D converter begins converting all pins selected
0
AD
( 2 p i n s ) / A N
t o A N
Z
R e s u l t
, 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-
0
7
A D
t o A N
( 8 p i n s )
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
Cleared to “0” when interrupt request is accepted, or cleared by software
AD
0
5
A D
T r i g g e r f o r s t a r t i n g
A / D c o n v e r s i o n
S a m p l e & H o l d
A D
c y c l e s
c y c l e s
0
pin is complete,
Item
0
pin is completed, the content of the
Result
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 .
O
O
S o f t w a r e t r i g g e r
T r i g g e r b y A D
N o t a c t i v a t e d
A c t i v a t e d
S e t - u p
( 3 )
A / D c o n v e r s i o n
i s c o m p l e t e
2. A/D Converter
R e s u l t
T R G