VSC056XKM datasheet(2/134 Pages) MAXIM

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Revision 4.1

January 2008

VSC056

Data Sheet

Additional control features include: selectable flash rates for direct LED drive, input edge detection for interrupt

generation, input to output bypass capability, fan speed monitoring control, and pulse-width modulated output

control. Support for sub-addressing additional two-wire serial slave devices using a set of seven control registers is

included. This capability allows up to 16 independent Master mode two-wire serial slave ports to be created using 32

of the I/O pins.

The addressing capability of the VSC056 includes three pins, which are used for device addressing, as well as one pin

that can be used to select two device type identifiers. Sixteen VSC056 devices can be used in a single two-wire serial

interface system.

Block Diagram

Two-Wire

Slav e

Interf ace

Interrupt Priority and Control

Clock

Generator

andDiv iders

I/OPorts

I/OControl

andLED

Flashing

P0.0

−P0.7

P1.0

−P1.7

P2.0

−P2.7

P3.0

−P3.7

P4.0

−P4.7

Fan Speed

Sensors

PortBy pass

Control

Power-On

Reset

CKSEL1

CKSEL0

SDA

SCL

−

ASEL

INT#

OSCI

OSCO

CKSEL2

P5.0

−P5.7

P6.0

−P6.7

P7.0

−P7.7

Pulse-Width

Modulation

Control

SYNCEN

SY NC#

RESET

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