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ADP5589ACBZ-00-R7

更新时间： 2024-09-21 12:33:19

品牌	Logo	应用领域
亚德诺 - ADI		解码器电信集成电路电信电路
页数	文件大小	规格书
52页	644K
描述
Keypad Decoder and I/O Expansion

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Keypad Decoder and I/O Expansion

Data Sheet

ADP5589

FEATURES

FUNCTIONAL BLOCK DIAGRAM

VDD

GND

16-element FIFO for event recording

19 configurable I/Os allowing functions such as

Keypad decoding for matrix up to 11 × 8

Key press/release interrupts

Key pad lock/unlock

GPIO functions

ADP5589

UVLO

POR

OSCILLATOR

RST

SDA

SCL

I C INTERFACE

INT

GPI with selectable interrupt level

100 kΩ or 300 kΩ pull-up resistors

300 kΩ pull-down resistors

GPO with push-pull or open drain

Dual programmable logic blocks

PWM generator

Internal PWM generation

External PWM with internal PWM AND function

Clock divider

C10

KEY SCAN

AND

DECODE

GPI SCAN

AND

DECODE

REGISTERS

I/O

CONFIG

LOGIC 1

LOGIC 2

CLK DIV

PWM

Reset generators

I²C interface with fast-mode plus (Fm+) support up to 1 MHz

Open-drain interrupt output

24-lead LFCSP 3.5 mm × 3.5 mm

25-ball WLCSP 1.99 mm × 1.99 mm

RESET 1

GEN

APPLICATIONS

Devices requiring keypad entry and I/O expansion

capabilities

RESET 2

GEN

Figure 1.

GENERAL DESCRIPTION

The ADP5589 is a 19 I/O port expander with built-in keypad

matrix decoder, programmable logic, reset generator, and

PWM generator. I/O expander ICs are used in portable devices

(phones, remote controls, and cameras) and nonportable

applications (healthcare, industrial, and instrumentation). I/O

expanders can be used to increase the number of I/Os available

to a processor or to reduce the number of I/Os required

through interface connectors for front panel designs.

need to monitor different registers for event changes. The

ADP5589 is equipped with a FIFO to store up to 16 events.

Events can be read back by the processor via an I²C compatible

interface.

The ADP5589 frees up the main processor from having to

monitor the keypad, thereby reducing power consumption

and/or increasing processor bandwidth for performing other

functions.

The ADP5589, which handles all key scanning and decoding,

can flag the main processor via an interrupt line when new key

events have occurred. In addition, GPI changes and logic

changes can be tracked as events via the FIFO, eliminating the

The programmable logic functions allow common logic

requirements to be integrated as part of the GPIO expander,

saving board area and cost.

Rev. B

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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