CY8C9520A_10 CYPRESS [Cypress Semiconductor], CY8C9520A_10 Datasheet

CY8C9520A_10

Manufacturer Part Number

CY8C9520A_10

Description

20, 40, and 60 Bit I/O Expander with EEPROM

Manufacturer

CYPRESS [Cypress Semiconductor]

Datasheet

1.CY8C9520A_10.pdf (32 pages)

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Features

■

Top Level Block Diagram

Cypress Semiconductor Corporation

Document Number: 38-12036 Rev. *E

SDA

SCL

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 I

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

C interface logic electrically compatible with SMBus

24 MHz

32 kHz

Divider (1-255)

93.75 kHz

Clocks

1.5 MHz

PWM 15

PWM 0

Power-on-Reset

Settings

User

Area

EEPROM

Control

Unit

Available

User

Area

GPort 0

GPort 1

GPort 2

GPort 3

GPort 7

•

198 Champion Court

4 Bit IO

or A1-A3, WD6

8 Bit IO

3 Bit IO

or A4-A6

8 Bit IO

5 Bit IO

8 Bit IO

INT

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

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 I

device is a multi port I/O expander (single I

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 I

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 config-

uration is pulled up internally.

The system master writes to the I/O configuration registers

through the I

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 I

masters. The I

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 I

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.

For details on how to configure I

"Communication - I

AN2304" at

•

San Jose

http://www.cypress.com.

C bus. Configuration and output register settings

C slave in this device requires that the I

CY8C9540A, CY8C9560A

C Port Expander with Flash Storage -

CA 95134-1709

C data bus. The Extendable Soft

Revised December 14, 2010

C slave devices. The first

C, see Application Note

CY8C9520A

EEPROM

C address to access

•408-943-2600

C address

C master

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