ATMEga64L ATMEL Corporation, ATMEga64L Datasheet - Page 265
ATMEga64L
Manufacturer Part Number
ATMEga64L
Description
8-bit AVR Microcontroller with 64K Bytes In-System Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA64L.pdf
(363 pages)
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Scanning the ADC
2490G–AVR–03/04
Figure 134 shows a block diagram of the ADC with all relevant control and observe sig-
nals. The Boundary-scan cell from Figure 130 is attached to each of these signals. The
ADC need not be used for pure connectivity testing, since all analog inputs are shared
with a digital port pin as well.
Figure 134. Analog to Digital Converter
The signals are described briefly in Table 105.
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
ADC_2
ADC_0
ADC_1
SCTEST
G10
AMPEN
ACLK
ST
TO COMPARATOR
+
-
10x
ADCBGEN
G20
VCCREN
IREFEN
AREF
PASSEN
+
-
20x
1.22V
Ref
GNDEN
ACTEN
2.56V
Ref
DAC_9..0
ADCEN
HOLD
AREF
PRECH
ATmega64(L)
10-bit DAC
AREF
+
-
DACOUT
COMP
265
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