PCA9556PW データシートの表示（PDF） - Philips Electronics

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PCA9556PW

Octal SMBus and I2C registered interface

Philips Electronics 

Philips Semiconductors

Octal SMBus and I2C registered interface

Product data

PCA9556

SIMPLIFIED SCHEMATIC OF I/O1 TO I/O7

DATA FROM

SHIFT REGISTER

DATA FROM

SHIFT REGISTER

WRITE

CONFIGURATION

PULSE

WRITE PULSE

CONFIGURATION

REGISTER

DQ

FF

CK Q

DQ

FF

CK Q

OUTPUT

PORT

REGISTER

READ PULSE

INPUT PORT

REGISTER

DQ

FF

CK Q

DATA FROM

SHIFT REGISTER

WRITE POLARITY

PULSE

DQ

FF

CK Q

POLARITY

INVERSION

REGISTER

NOTE: On power–up or reset, all registers return to default values.

Figure 5. Simplified schematic of I/O1 to I/O7

OUTPUT PORT

REGISTER DATA

VDD

ESD PROTECTION DIODE

I/O0 TO I/O15

ESD PROTECTION DIODE

VSS

INPUT PORT

REGISTER DATA

POLARITY

REGISTER DATA

SW00796

2002 Mar 28

6

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