339
A-D Converter
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Figure 2.8.12. Set-up procedure of repeat sweep mode 0
b7
b0
1
Setting A-D conversion start flag
A-D control register 0 [Address 03D6
16
]
ADCON0
A-D conversion start flag
1 : A-D conversion started
Transmitting conversion result to A-D register i
Eight low-order bits of A-D conversion result
b7
b0
(b15)
(b8)
b7
b0
A-D register 0
A-D register 1
A-D register 2
A-D register 3
A-D register 4
A-D register 5
A-D register 6
A-D register 7
[Address 03C1
16
, 03C0
16
]
[Address 03C3
16
, 03C2
16
]
[Address 03C5
16
, 03C4
16
]
[Address 03C7
16
, 03C6
16
]
[Address 03C9
16
, 03C8
16
]
[Address 03CB
16
, 03CA
16
] AD5
[Address 03CD
16
, 03CC
16
] AD6
[Address 03CF
16
, 03CE
16
] AD7
AD0
AD1
AD2
AD3
AD4
During 10-bit mode
Two high-order bits of A-D conversion result
During 8-bit mode
When read, the content is indeterminate
Start A-D conversion
b7
b0
0
Setting A-D conversion start flag
A-D control register 0 [Address 03D6
16
]
ADCON0
A-D conversion start flag
0 : A-D conversion disabled
Stop A-D conversion
b7
b0
1
Selecting Sample and hold
A-D control register 2 [Address 03D4
16
]
ADCON2
A-D conversion method select bit
1 : With sample and hold
b7
b0
Setting A-D control register 0 and A-D control register 1
A-D control register 0
[Address 03D6
16
]
ADCON0
A-D sweep pin select bit (Note)
b1 b0
0 0 : AN
0
, AN
1
(2 pins)
0 1 : AN
0
to AN
3
(4 pins)
1 0 : AN
0
to AN
5
(6 pins)
1 1 : AN
0
to AN
7
(8 pins)
b7
0
b0
A-D control register 1 [Address 03D7
16
]
ADCON1
A-D operation mode select bit 1
(Note)
0 (Must always be “0” in repeat sweep mode 0)
8/10-bit mode select bit
0 : 8-bit mode
1 : 10-bit mode
Frequency select bit 1
0 : f
AD
/2 or f
AD
/4 is selected
1 : f
AD
is selected
Repeat sweep mode 0 is selected
(Note)
Nothing is arranged for this bit.
Fix “0” to this bit.
A-D conversion start flag
0 : A-D conversion disabled
Frequency select bit 0
0 : f
AD
/4 is selected
1 : f
AD
/2 is selected
0
0
1
1
Vref connect bit
1 : Vref connected
0
0
1
Invalid in repeat sweep mode 0
Repeatedly carries out A-D conversion on pins
selected through the A-D sweep pin select bit.
Note: Rewrite to analog input pin select bit after changing A-D operation mode.
Nothing is arranged for these bits.
Fix “0” to these bits.