Datasheet

226
ATmega32A [DATASHEET]
Atmel-8155D-AVR-ATmega32A-Datasheet_02/2014
Table 25-5. Boundary-scan Signals for the ADC
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
COMP Output Comparator Output 0 0
ACLK Input Clock signal to gain stages
implemented as Switch-cap filters
00
ACTEN Input Enable path from gain stages to
the comparator
00
ADCBGEN Input Enable Band-gap reference as
negative input to comparator
00
ADCEN Input Power-on signal to the ADC 0 0
AMPEN Input Power-on signal to the gain stages 0 0
DAC_9 Input Bit 9 of digital value to DAC 1 1
DAC_8 Input Bit 8 of digital value to DAC 0 0
DAC_7 Input Bit 7 of digital value to DAC 0 0
DAC_6 Input Bit 6 of digital value to DAC 0 0
DAC_5 Input Bit 5 of digital value to DAC 0 0
DAC_4 Input Bit 4 of digital value to DAC 0 0
DAC_3 Input Bit 3 of digital value to DAC 0 0
DAC_2 Input Bit 2 of digital value to DAC 0 0
DAC_1 Input Bit 1 of digital value to DAC 0 0
DAC_0 Input Bit 0 of digital value to DAC 0 0
EXTCH Input Connect ADC channels 0 - 3 to by-
pass path around gain stages
11
G10 Input Enable 10x gain 0 0
G20 Input Enable 20x gain 0 0
GNDEN Input Ground the negative input to
comparator when true
00
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.
11
IREFEN Input Enables Band-gap reference as
AREF signal to DAC
00
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