Cypress Semiconductor Electronic Components Datasheet

CY8C9540A Datasheet

20 - 40 and 60 Bit I/O Expander

No Preview Available !

CY8C9520A

CY8C9540A

CY8C9560A

20-, 40-, and 60-Bit I/O Expander

with EEPROM

Features

■ I2C interface logic electrically compatible with SMBus

■ Up to 20 (CY8C9520A), 40 (CY8C9540A), or 60 (CY8C9560A)

I/O data pins independently configurable as inputs, outputs,

Bi-directional input/outputs, or PWM outputs

■ 4/8/16 PWM sources with 8-bit resolution

■ Extendable soft addressing algorithm allowing flexible I2C

address configuration

■ Internal 3-/11-/27-Kbyte EEPROM

■ User default storage, I/O port settings in internal EEPROM

■ Optional EEPROM write disable (WD) input

■ Interrupt output indicates input pin level changes and pulse

width modulator (PWM) state changes

■ Internal power on reset (POR)

■ Internal configurable watchdog timer

Top Level Block Diagram

WD EEPROM

User

Settings

Area

User

Available

Area

Clocks

32 kHz

24 MHz

1.5 MHz

93.75 kHz

Divider (1-255)

PWM 0

Control

Unit

GPort 0

GPort 1

GPort 2

8 Bit IO

5 Bit IO

3 Bit IO

or A4-A6

4 Bit IO

or A1-A3, WD6

GPort 3

8 Bit IO

PWM 15

GPort 7

8 Bit IO

SCL

SDA

V dd

V ss

Power-on-Reset

INT

Overview

The CY8C95xxA is a multi-port I/O expander with on board user

available EEPROM and several PWM outputs. All devices in this

family operate identically but differ in I/O pins, number of PWMs,

and internal EEPROM size.

The CY8C95xxA operates as two I2C slave devices. The first

device is a multi port I/O expander (single I2C address to access

all ports through registers). The second device is a serial

EEPROM. Dedicated configuration registers can be used to

disable the EEPROM. The EEPROM uses 2-byte addressing to

support the 28 Kbyte EEPROM address space. The selected

device is defined by the most significant bits of the I2C address

or by specific register addressing.

The I/O expander's data pins can be independently assigned as

inputs, outputs, quasi-bidirectional input/outputs or PWM ouputs.

The individual data pins can be configured as open drain or

collector, strong drive (10 mA source, 25 mA sink), resistively

pulled up or down, or high impedance. The factory default

configuration is pulled up internally.

The system master writes to the I/O configuration registers

through the I2C bus. Configuration and output register settings

are storable as user defaults in a dedicated section of the

EEPROM. If user defaults were stored in EEPROM, they are

restored to the ports at power up. While this device can share the

bus with SMBus devices, it can only communicate with I2C

masters. The I2C slave in this device requires that the I2C master

supports clock stretching.

There is one dedicated pin that is configured as an interrupt

output (INT) and can be connected to the interrupt logic of the

system master. This signal can inform the system master that

there is incoming data on its ports or that the PWM output state

was changed.

The EEPROM is byte readable and supports byte-by-byte

writing. A pin can be configured as an EEPROM Write Disable

(WD) input that blocks write operations when set high. The

configuration registers can also disable EEPROM operations.

The CY8C95xxA has one fixed address pin (A0) and up to six

additional pins (A1-A6), which allow up to 128 devices to share

a common two wire I2C data bus. The Extendable Soft

Addressing algorithm provides the option to choose the number

of pins needed to assign the desired address. Pins not used for

address bits are available as GPIO pins.

There are 4 (CY8C9520A), 8 (CY8C9540A), or 16 (CY8C9560A)

independently configurable 8-bit PWMs. These PWMs are listed

as PWM0-PWM15. Each PWM can be clocked by one of six

available clock sources.

Errata: For information on silicon errata, see Errata on page 30. Details include trigger conditions, devices affected, and proposed workaround.

Cypress Semiconductor Corporation • 198 Champion Court

Document Number: 38-12036 Rev. *I

• San Jose, CA 95134-1709 • 408-943-2600

Revised April 1, 2015

Cypress Semiconductor Electronic Components Datasheet

CY8C9540A Datasheet

20 - 40 and 60 Bit I/O Expander

No Preview Available !

CY8C9520A

CY8C9540A

CY8C9560A

Contents

Architecture ...................................................................... 3

Applications ................................................................. 3

Device Access Addressing .............................................. 4

Serial EEPROM Device ............................................... 4

Multi Port I/O Device ................................................... 4

Pinouts .............................................................................. 5

28-Pin Part Pinout ....................................................... 5

48-Pin Part Pinout ....................................................... 6

100-Pin Part Pinout ..................................................... 7

Pin Descriptions ............................................................... 9

Extendable Soft Addressing ........................................ 9

Interrupt Pin (INT) ........................................................ 9

Write Disable Pin (WD) ............................................... 9

External Reset Pin (XRES) ......................................... 9

Working with PWMs .................................................... 9

Input Port Registers (00h–07h) ................................. 11

Output Port Registers (08h–0Fh) .............................. 11

Int. Status Port Registers (10h–17h) ......................... 12

Port Select Register (18h) ......................................... 12

Interrupt Mask Port Register (19h) ............................ 12

Select PWM Register (1Ah) ...................................... 12

Inversion Register (1Bh) ............................................ 12

Port Direction Register (1Ch) .................................... 12

Drive Mode Registers (1Dh–23h) .............................. 12

PWM Select Register (28h) ....................................... 12

Config (29h) ............................................................... 13

Period Register (2Ah) ................................................ 13

Pulse Width Register (2Bh) ....................................... 13

Divider Register (2Ch) ............................................... 13

Enable Register (2Dh) ............................................... 13

Device ID/Status Register (2Eh) ............................... 13

Watchdog Register (2Fh) .......................................... 14

Command Register (30h) .......................................... 14

Commands Description ................................................. 14

Store Config to E2 POR Defaults Cmd (01h) ............ 14

Restore Factory Defaults Cmd (02h) ......................... 14

Write E2 POR Defaults Cmd (03h) ............................ 14

Read E2 POR Defaults Cmd (04h) ........................... 15

Write Device Config Cmd (05h) ................................. 15

Read Device Config Cmd (06h) ................................ 15

Reconfigure Device Cmd (07h) ................................. 15

Electrical Specifications ................................................ 16

Absolute Maximum Ratings ....................................... 16

Operating Temperature ............................................. 16

DC Electrical Characteristics ..................................... 17

AC Electrical Characteristics ..................................... 19

Packaging Dimensions .................................................. 21

Thermal Impedances ................................................. 23

Solder Reflow Specifications ..................................... 23

Features and Ordering Information .............................. 24

Ordering Code Definitions ......................................... 24

Acronyms ........................................................................ 25

Reference Documents .................................................... 25

Document Conventions ................................................. 25

Units of Measure ....................................................... 25

Numeric Conventions .................................................... 25

Numeric Naming ........................................................ 25

Glossary .......................................................................... 26

Errata ............................................................................... 30

Part Numbers Affected .............................................. 30

Qualification Status ................................................... 30

Errata Summary ........................................................ 30

Document History Page ................................................. 31

Sales, Solutions, and Legal Information ...................... 32

Worldwide Sales and Design Support ....................... 32

Products .................................................................... 32

PSoC® Solutions ...................................................... 32

Cypress Developer Community ................................. 32

Technical Support ..................................................... 32

Document Number: 38-12036 Rev. *I

Page 2 of 32

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf

CY8C9540A Datasheet

20 - 40 and 60 Bit I/O Expander

CY8C9540A Datasheet

20 - 40 and 60 Bit I/O Expander

Similar Datasheet

Part Number Start With