COM20051 データシートの表示（PDF） - SMSC -> Microchip

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COM20051

Integrated Microcontroller and Network Interface with Watchdog Timer and A/D Converter Interface

SMSC -> Microchip 

HARDWARE OR

SOFTWARE

RESET

INITIATE NETWORK

RECONFIGURATION

SEND NACK

N

SEND ACK FRAME

AND SET RI

Y

NO

ERRORS?

Y & NO

TOKEN

N

FRAME

ADDRESSED TO

RECEIVE FREE

BUFFER

THIS NODE?

ENQUIRY

Y & TOKEN

N

RECEIVE Y

COMMAND

ISSUED?

SEND ACK FRAME

RECEIVE DATA

RECEIVE TOKEN

SET TMA BIT

Y & BROADCAST

Y

TRANSMIT Y

COMMAND

ISSUED?

N

PASS TOKEN

TO NEXT

HIGHER NODE

ISSUE FREE

BUFFER

ENQUIRY

ACK

Y

RECEIVED?

N

TRANSMIT

DATA AND

SET TA

ACK

N

RECEIVED?

FIGURE 3 – ARCNET PROTOCOL FLOW

12

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