ATMEGA16-16AU SL602 Atmel, ATMEGA16-16AU SL602 Datasheet - Page 237

• Manufacturer Part Number: ATMEGA16-16AU SL602
• Manufacturer: Atmel

Table 91. Boundary-scan Signals for the Analog Comparator
Scanning the ADC
Figure 123
Figure 122
inputs are shared with a digital port pin as well.
Figure 123. Analog to Digital Converter
The signals are described briefly in
2466T–AVR–07/10
Signal
Name
AC_IDLE
ACO
ACME
ACBG
NEGSEL_2
NEGSEL_1
NEGSEL_0
MUXEN_7
MUXEN_6
MUXEN_5
MUXEN_4
MUXEN_3
MUXEN_2
MUXEN_1
MUXEN_0
EXTCH
ADC_7
ADC_6
ADC_5
ADC_4
ADC_3
ADC_2
ADC_1
ADC_0
shows a block diagram of the ADC with all relevant control and observe signals. The Boundary-scan cell from
is attached to each of these signals. The ADC need not be used for pure connectivity testing, since all analog
ADC_2
ADC_0
ADC_1
Direction as Seen from
the Comparator
Input
Output
Input
Input
SCTEST
AMPEN
ACLK
G10
ST
Table
To Comparator
Description
Turns off Analog
comparator when true
Analog Comparator
Output
Uses output signal from
ADC mux when true
Bandgap Reference
enable
+
-
10x
92.
G20
ADCBGEN
VCCREN
IREFEN
AREF
PASSEN
+
-
20x
1.22V
GNDEN
ACTEN
ref
Recommended Input
when Not in Use
Will become input to µC
code being executed
2.56V
ref
1
0
0
DAC_9..0
ADCEN
HOLD
PRECH
AREF
Output Values when
Recommended Inputs are Used
Depends upon µC code being
executed
0
Depends upon µC code being
executed
Depends upon µC code being
executed
10-bit DAC
AREF
ATmega16(L)
+
-
DACOUT
COMP
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