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PCA9556PW Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer PCA9556PW
Beschreibung Octal SMBus Registered Interface
Hersteller NXP Semiconductors
Logo NXP Semiconductors Logo 




Gesamt 12 Seiten
PCA9556PW Datasheet, Funktion
INTEGRATED CIRCUITS
PCA9556
Octal SMBus Registered Interface
Product specification
1998 Dec 18
Philips
Semiconductors






PCA9556PW Datasheet, Funktion
Philips Semiconductors
Octal SMBus Registered Interface
Product specification
PCA9556
SMBus Address
slave address
0 0 1 1 A2 A1 A0 R/W
fixed
programmable
su01048
Figure 5. PCA9556 address
SMBus Transactions
Data is transmitted to the PCA9556 registers using Write Byte transfers (see Figures 6 and 7). Data is read from the PCA9556 registers using
Read and Receive Byte transfers (see FIgures 8 and 9).
SCL
1 2345 6 78 9
slave address
command byte
data to port
SDA S 0 0 1 1 A2 A1 A0 0 A 0 0 0 0 0 0 0 1 A
start condition
WRITE TO
PORT
R/W acknowledge
from slave
acknowledge
from slave
DATA 1
DATA OUT
FROM PORT
Figure 6. WRITE to output port register via Write Byte Protocol
A
acknowledge
from slave
DATA 1 VALID
tpv
su01049
SCL
1 2345 6 78 9
slave address
command byte
data to register
SDA S 0 0 1 1 A2 A1 A0 0 A 0 0 0 0 0 0 1 1/0 A
start condition
R/W acknowledge
from slave
acknowledge
from slave
DATA
A
acknowledge
from slave
Figure 7. WRITE to I/O configuration or polarity inversion registers via Write Byte Protocol
su01050
1998 Dec 18
6

6 Page









PCA9556PW pdf, datenblatt
Philips Semiconductors
Octal SMbus Registered Interface
Product specification
PCA9556
Purchase of Philips I2C components conveys a license under the Philips’ I2C patent
to use the components in the I2C system provided the system conforms to the
I2C specifications defined by Philips. This specification can be ordered using the
code 9398 393 40011.
Data sheet status
Data sheet
status
Product
status
Definition [1]
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
Product
specification
Production
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
© Copyright Philips Electronics North America Corporation 1999
All rights reserved. Printed in U.S.A.
Document order number:
Date of release: 04-99
9397 750 04974
Philips
Semiconductors
1998 Dec 18
12

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