MEGA128CAN Datasheet, PDF (299/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

4250E–CAN–12/04
Figure 150. Analog Comparator
BANDGAP
REFERENCE
ACBG
AT90CAN128
ACME
ADCEN
ADC MULTIPLEXER
OUTPUT
AC_IDLE
ACO
Figure 151. General Boundary-scan cell Used for Signals for Comparator and ADC
ShiftDR
To
Next
Cell
EXTEST
From Digital Logic/
From Analog Ciruitry
0
To Analog Circuitry/
To Digital Logic
1
0
DQ
DQ
1
G
From
Previous
Cell
ClockDR
UpdateDR
Table 110. Boundary-scan Signals for the Analog Comparator
Signal
Name
Direction as
Seen from the
Comparator
Description
Recommended Output Values when
Input when Not Recommended
in Use
Inputs are Used
AC_IDLE input
Turns off Analog
1
Comparator when
true
Depends upon µC
code being executed
ACO
output
Analog
Will become
0
Comparator Output input to µC
code being
executed
ACME
input
Uses output signal 0
from ADC mux
when true
Depends upon µC
code being executed
ACBG
input
Bandgap
0
Reference enable
Depends upon µC
code being executed
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