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14. A/D Converter
page 192
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Figure 14.1.6.2 ADCON0 to ADCON2 Registers for Simultaneous Sample Sweep Mode
A/D control register 0 (Note 1)
Symbol
Address
After reset
ADCON0
03D616
00000XXX2
b7
b6
b5
b4
b3
b2
b1
b0
Analog Input Pin
Select Bit
CH0
Bit symbol
Bit name
Function
CH1
CH2
A/D Operation Mode
Select Bit 0
MD0
MD1
Trigger Select Bit
TRG
ADST
A/D Conversion Start Fag
0 : A/D conversion disabled
1 : A/D conversion started
Frequency Select Bit 0
CKS0
RW
A/D control register 1 (Note 1)
Symbol
Address
After reset
ADCON1
03D716
0016
Bit name
Function
Bit symbol
b7
b6
b5
b4
b3
b2
b1
b0
A/D Sweep Pin
Select Bit (Note 2)
SCAN0
SCAN1
MD2
BITS
8/10-Bit Mode Select Bit
0 : 8-bit mode
1 : 10-bit mode
VCUT
VREF Connect Bit (Note 3)
A/D Operation Mode
Select Bit 1
1 : VREF connected
1
0
1
Frequency Select Bit 1
CKS1
0 : Any mode other than repeat sweep
mode 1
RW
Refer to Table 14.2 A/D Conversion
Frequency Select
Refer to Table 14.2 A/D Conversion
Frequency Select
(b7-b6)
0
Note 1: If the ADCON2 register is rewritten during A/D conversion, the conversion result will be indeterminate.
A/D control register 2 (Note 1)
Symbol
Address
After reset
ADCON2
03D416
0016
b7
b6
b5
b4
b3
b2
b1
b0
A/D Conversion Method
Select Bit
Bit symbol
Bit name
Function
RW
SMP
Reserved Bit
Set to
“0”
0
A/D Input Group
Select Bit
0 0 : Select port P10 group (ANi)
0 1 : Select port P9 group (AN3i)
1 0 : Do not set
1 1 : Do not set
b2 b1
Frequency Select Bit 2
CKS2
ADGSEL0
ADGSEL1
RW
(b3)
Nothing is assigned. When write, set to “0”.
When read, its content is “0”.
(b7-b6)
Refer to Table 14.2 A/D Conversion
Frequency Select
RW
TRG1
Trigger select bit 1
Note 1: If the ADCON0 register is rewritten during A/D conversion, the conversion result will be indeterminate.
Refer to Table 14.1.6.2 Trigger Select Bit
Setting in Simultaneous Sample Sweep
Mode
Note 1: If the ADCON1 register is rewritten during A/D conversion, the conversion result will be indeterminate.
Note 2: AN30 to AN32 can be used in the same way as AN0 to AN7. Use the ADGSEL1 to ADGSET0 bits in the
ADCON2 register to select the desired pin.
Note 3: If the VCUT bit is reset from “0” (VREF unconnected) to “1” (VREF connected), wait for 1 s or more before
starting A/D conversion.
Invalid in simultaneous sample sweep mode
1 0 : Single sweep mode or simultaneous
sample sweep mode
b4 b3
When selecting simultaneous sample sweep
mode
0 0 : AN0 to AN1 (2 pins)
0 1 : AN0 to AN3 (4 pins)
1 0 : AN0 to AN5 (6 pins)
1 1 : AN0 to AN7 (8 pins)
b1 b0
1
Refer to Table 14.1.6.2 Trigger Select Bit
Setting in Simultaneous Sample Sweep
Mode
Set to “1” in simultaneous sample
sweep mode
Nothing is assigned. When write, set to “0”.
When read, its content is “0”.