DS1WM

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The operation of the 1-Wire bus is described in detail in the Book of iButton Standards [1]; therefore, the

details of that will not be discussed in this document. Each slave device, in general, has its own set of

commands that are described in detail in that device’s data sheet. The user is referred to those documents

for detail on specific slave implementations.

BLOCK DIAGRAM

INTERRUPT REGISTER

INT ENABLE REGISTER

DATA BUS

BUFFER

CONTROL

LOGIC

MASTER

RESET

1-WIRE

TIMING

AND

CONTROL

INTERRUPT

CONTROL

LOGIC

DQ

A0

MR

D0-D7

INTR

A1

A2

ADS

RD

WR

EN

CLK

CLOCK

DIVIDER

COMMAND REGISTER

TRANSMIT BUFFER

Tx SHIFT REGISTER

Rx SHIFT REGISTER

RECEIVE BUFFER

CLOCK DIV REGISTER