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ATmega64A Datasheet(PDF) 271 Page - ATMEL Corporation

Part # ATmega64A
Description  8-bit Microcontroller with 64K Bytes In-System Programmable Flash
PDF  392 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega64A Datasheet(HTML) 271 Page - ATMEL Corporation

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271
8160C–AVR–07/09
ATmega64A
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
MUXEN_1
Input
Input Mux bit 1
0
0
MUXEN_0
Input
Input Mux bit 0
1
1
NEGSEL_2
Input
Input Mux for negative
input for differential
signal, bit 2
00
NEGSEL_1
Input
Input Mux for negative
input for differential
signal, bit 1
00
NEGSEL_0
Input
Input Mux for negative
input for differential
signal, bit 0
00
PASSEN
Input
Enable pass-gate of
gain stages.
11
PRECH
Input
Precharge output
latch of comparator
(Active low)
11
Table 25-5.
Boundary-scan Signals for the ADC
(1) (Continued)
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



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