AT83C24B datasheet(36/42 Pages) ATMEL

Part #	AT83C24B

Description	Smart Card Reader Interface with Power Management

PDF	42 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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36 / 42 page

4234F–SCR–10/05

AT83C24

Typical NDS

Application

Figure 2. Typical NDS Standard Mode Application Diagram for 1 AT83C24NDS.

Note:

1. The external resistor on I/O can be removed if the host pin has an internal resistor.

2. The internal pull up on PRES/INT is disabled during reset (recommended external 20kOhms

pull up).

3. Refer to application note for AT83C24NDS software configuration.

100nF

XTAL1

XTAL2

1uF

Host

CVSS

2.2µF

C10

4.7µH

VSS

PRES/INT

CLK

CVCC

CVSS

SCL

SDA

I/O, C4, C8

MICROCONTROLLER

TWI

INT0

Px.y

RESET

RST

18.432 or 27MHz

A2/CLK

A1/RST

A0/3V

EVCC

VSS

DVCC

100nF

VCC

2.2uF

CVSS

VSS

Reset

pullup

SDA,

SCL

pullups

See note1

for

I/O pull up

CRST

CPRES

CIO, CC4, CC8

CCLK

AT83C24NDS

100nF

C13

VSS

Px.y

VSS

card

Smart

Card 1

CVCCin

present

See note 2

AT83C24B Datasheet(PDF) 36 Page - ATMEL Corporation

AT83C24B Datasheet(HTML) 36 Page - ATMEL Corporation

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