ATMEGA64L-8MI 查看數據表（PDF） - Atmel Corporation
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ATMEGA64L-8MI
Atmel Corporation
ATMEGA64L-8MI Datasheet PDF : 363 Pages
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2490G–AVR–03/04
ATmega64(L)
Table 105. 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
GNDEN
Input
Ground the negative
0
0
input to comparator
when true
HOLD
Input
Sample&Hold
1
1
signal. Sample
analog signal when
low. Hold signal
when high. If gain
stages are used,
this signal must go
active when ACLK
is high.
IREFEN
Input
Enables Band-gap
0
0
reference as AREF
signal to DAC
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
0
0
negative input for
differential signal,
bit 2
NEGSEL_1 Input
Input Mux for
0
0
negative input for
differential signal,
bit 1
NEGSEL_0 Input
Input Mux for
0
0
negative input for
differential signal,
bit 0
PASSEN
Input
Enable pass-gate of
1
1
gain stages.
PRECH
Input
Precharge output
1
1
latch of comparator
(Active low)
267
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