ATmega64A datasheet(270/392 Pages) ATMEL

tên linh kiện	ATmega64A

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 64K Bytes In-System Programmable Flash

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270

8160C–AVR–07/09

ATmega64A

Table 25-5.

Boundary-scan Signals for the ADC(1)

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

COMP

Output

Comparator Output

ACLK

Input

Clock signal to gain

stages implemented

as Switch-cap filters

ACTEN

Input

Enable path from gain

stages to the

Comparator

ADCBGEN

Input

Enable Band-gap

reference as negative

input to Comparator

ADCEN

Input

Power-on signal to the

ADC

AMPEN

Input

Power-on signal to the

gain stages

DAC_9

Input

Bit nine of digital value

to DAC

DAC_8

Input

Bit eight of digital

value to DAC

DAC_7

Input

Bit seven of digital

value to DAC

DAC_6

Input

Bit six of digital value

to DAC

DAC_5

Input

Bit five of digital value

to DAC

DAC_4

Input

Bit four of digital value

to DAC

DAC_3

Input

Bit three of digital

value to DAC

DAC_2

Input

Bit two of digital value

to DAC

DAC_1

Input

Bit 1 of digital value to

DAC

DAC_0

Input

Bit 0 of digital value to

DAC

EXTCH

Input

Connect ADC

channels 0 - 3 to

bypass path around

gain stages

G10

Input

Enable 10x gain

G20

Input

Enable 20x gain

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