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543
•
Bit 4—Clock Select (CKS): Sets the A/D conversion time. Set, according to the operating
frequency, to give a conversion time of at least 2 µs (5 V version) or 4 µs (3.3 V version).
Make conversion time changes only while conversion is halted.
Bit 4: CKS
Description
0
Conversion time = 40 states (A/D converter standard clock =
φ
/2) (initial
value)
1
Conversion time = 80 states (when
φ
/4 is selected)
•
Bit 3—Group Mode (GRP): Designates either select mode or group mode for the A/D
conversion channel selection.
Set the GRP bit only while conversion is halted.
Bit 3: GRP
Description
0
Select mode (initial value)
1
Group mode
•
Bits 2–0—Channel Select 2–0 (CH2–CH0): These bits, along with the GRP bit, select the
analog input channel.
Set the input channel only while conversion is halted.
Description
Bit 2: CH2
Bit 1: CH1
Bit 0: CH0
Select Mode (GRP = 0)
Group Mode (GRP = 1)
0
0
0
AN0 (initial value)
AN0
0
0
1
AN1
AN0–AN1
0
1
0
AN2
AN0–AN2
0
1
1
AN3
AN0–AN3
1
0
0
AN4
AN0–AN4
1
0
1
AN5
AN0–AN5
1
1
0
AN6
AN0–AN6
1
1
1
AN7
AN0–AN7
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