Datasheet

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