ATmega64A datasheet(271/392 Pages) ATMEL

tên linh kiện	ATmega64A

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

PDF	392 Pages

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nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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271 / 392 page

271

8160C–AVR–07/09

ATmega64A

GNDEN

Input

Ground the negative

input to comparator

when true

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.

IREFEN

Input

Enables Band-gap

reference as AREF

signal to DAC

MUXEN_7

Input

Input Mux bit 7

MUXEN_6

Input

Input Mux bit 6

MUXEN_5

Input

Input Mux bit 5

MUXEN_4

Input

Input Mux bit 4

MUXEN_3

Input

Input Mux bit 3

MUXEN_2

Input

Input Mux bit 2

MUXEN_1

Input

Input Mux bit 1

MUXEN_0

Input

Input Mux bit 0

NEGSEL_2

Input

Input Mux for negative

input for differential

signal, bit 2

NEGSEL_1

Input

Input Mux for negative

input for differential

signal, bit 1

NEGSEL_0

Input

Input Mux for negative

input for differential

signal, bit 0

PASSEN

Input

Enable pass-gate of

gain stages.

PRECH

Input

Precharge output

latch of comparator

(Active low)

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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