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S e l e c t i n g S a m p l e a n d h o l d
b 7
0
S e t t i n g A D c o n t r o l r e g i s t e r 0 a n d A D c o n t r o l r e g i s t e r 1
b 7
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0
Note 1 : Rewrite to analog input pin select bit after changing A/D operation mode.
Note 2 : When f(X
Setting A/D conversion start flag
b7
1
Reading conversion result
(b15)
b7
Figure 2.9.11. Set-up procedure of single sweep mode
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
b 0
A D c o n t r o l r e g i s t e r 2 [ A d d r e s s 0 3 D 4
0
0
1
A D C O N 2
A / D c o n v e r s i o n m e t h o d s e l e c t b i t
1 : W i t h s a m p l e a n d h o l d
M u s t a l w a y s b e s e t t o " 0 "
b 0
A D c o n t r o l r e g i s t e r 0
0
1 0
[ A d d r e s s 0 3 D 6
1 6
I n v a l i d i n s i n g l e s w e e p m o d e
S i n g l e s w e e p m o d e i s s e l e c t e d
( N o t e 1 )
T r i g g e r s e l e c t b i t
0 : S o f t w a r e t r i g g e r
A/D conversion start flag
0 : A/D conversion disabled
Frequency select bit 0 (Note 2)
0 : f
/3 or f
/4 is selected
AD
AD
1 : f
or f
/2 is selected
AD
AD
) is over 10 MHz, the f
IN
AD
b0
A D c o n t r o l r e g i s t e r 0 [ A d d r e s s 0 3 D 6
A D C O N 0
A / D c o n v e r s i o n s t a r t f l a g
1 : A / D c o n v e r s i o n s t a r t e d
(b8)
b 0
b 7
page 225 of 354
]
1 6
b 7
0 0
1
0
] A D C O N 0
frequency must be under 10 MHz by dividing and set ø
]
1 6
S t a r t A / D c o n v e r s i o n
Stop A/D conversion
AD register 0
[Address 03C1
AD register 1
[Address 03C3
AD register 2
[Address 03C5
b 0
AD register 3
[Address 03C7
AD register 4
[Address 03C9
AD register 5
[Address 03CB
AD register 6
[Address 03CD
AD register 7
[Address 03CF
Eight low-order bits of A/D conversion result
During 10-bit mode
Two high-order bits of A/D conversion result
During 8-bit mode
When read, the content is indeterminate
b0
AD control register 1 [Address 03D7
ADCON1
A/D sweep pin select bit (Note 1)
b 1 b 0
0 0 : AN
, AN
(2 pins)
0
1
0 1 : AN
to AN
(4 pins)
0
3
1 0 : AN
to AN
(6 pins)
0
5
1 1 : AN
to AN
(8 pins)
0
7
A/D operation mode select bit 1 (Note 1)
0 (Must always be "0" in Single sweep mode)
8/10-bit mode select bit
0 : 8-bit mode
1 : 10-bit mode
Frequency select bit 1 (Note 2)
0 : f
/2 or f
/4 is selected
AD
AD
1 : f
or f
/3 is selected
AD
AD
Vref connect bit
1 : Vref connected
R e s e r v e d b i t
frequency to 10 MHz or lower.
AD
, 03C0
] AD0
16
16
, 03C2
] AD1
16
16
, 03C4
] AD2
16
16
, 03C6
] AD3
16
16
, 03C8
] AD4
16
16
, 03CA
] AD5
16
16
, 03CC
] AD6
16
16
, 03CE
] AD7
16
16
2. A/D Converter
]
16
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