Atmega169v/l – Rainbow Electronics Atmega169L User Manual
Page 241
241
ATmega169V/L
2514A–AVR–08/02
Table 105. Boundary-scan Signals for the ADC
Signal
Name
Direction
as Seen
from the
ADC
Description
Recommen-
ded 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
0
0
ACTEN
Input
Enable path from gain
stages to the
comparator
0
0
ADHSM
Input
Increases speed of
comparator at the
sacrifice of higher
power consumption
0
0
ADCBGEN
Input
Enable Band-gap
reference as negative
input to comparator
0
0
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
1
1