Datasheet

Signal Name Direction as
Seen from
the ADC
Description Recommended
Input when not in
Use
Output Values
when
Recommended
Inputs are Used,
and CPU is not
Using the ADC
HOLD Input Sample & Hold signal. Sample
analog signal when low. Hold
signal when high. If gain
stages are used, this signal
must go active when ACLK is
high.
1 1
IREFEN Input Enables Band-gap reference
as AREF signal to DAC
0 0
MUXEN_7 Input Input Mux bit 7 0 0
MUXEN_6 Input Input Mux bit 6 0 0
MUXEN_5 Input Input Mux bit 5 0 0
MUXEN_4 Input Input Mux bit 4 0 0
MUXEN_3 Input Input Mux bit 3 0 0
MUXEN_2 Input Input Mux bit 2 0 0
MUXEN_1 Input Input Mux bit 1 0 0
MUXEN_0 Input Input Mux bit 0 1 1
NEGSEL_2 Input Input Mux for negative input for
differential signal, bit 2
0 0
NEGSEL_1 Input Input Mux for negative input for
differential signal, bit 1
0 0
NEGSEL_0 Input Input Mux for negative input for
differential signal, bit 0
0 0
PASSEN Input Enable pass-gate of gain
stages.
1 1
PRECH Input Precharge output latch of
comparator. (Active low)
1 1
SCTEST Input Switch-cap TEST enable.
Output from x10 gain stage
send out to Port Pin having
ADC_4
0 0
Atmel ATmega32A [DATASHEET]
Atmel-8155I-ATmega32A_Datasheet_Complete-08/2016
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