Rainbow-electronics DS2422 Bedienungsanleitung PDF herunterladen (Seite 13)

DS2422/DS2423

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MEMORY FUNCTION EXAMPLE (DS2423)

Read page 14 and counts of Input A. Rewrite page 14 with 32 bytes. Read Memory + Counter, Write

Scratchpad, Copy Scratchpad.

MASTER MODE DATA (LSB FIRST) COMMENTS

TX Reset Reset pulse (480-960 µs)

RX Presence Presence pulse

TX CCh Issue “skip ROM” command

TX A5h Issue “read memory + counter” command

TX C0h TA1, beginning offset=C0h

TX 01h TA2, address=01C0h

RX <32 data bytes> Read 32 bytes of data

RX <4 data bytes> Read Counts of Input A

RX <4 data bytes> Read 32 Zero Bits

RX <2 data bytes> Read (inverted) CRC16

TX Reset Reset pulse

RX Presence Presence pulse

TX CCh Issue “skip ROM” command

TX 0Fh Issue “write scratchpad” command

TX C0h TA1, beginning offset=C0h

TX 01h TA2, address=01C0h

TX <32 data bytes> Read 32 bytes of data to scratchpad

RX <2 data bytes> Read (inverted) CRC16

TX Reset Reset pulse

RX Presence Presence pulse

TX CCh Issue “skip ROM” command

TX 5Ah Issue “copy scratchpad” command

TX C0h

TX 01h

TX 1Fh

TA1

TA2 AUTHORIZATION CODE

E/S

RX <1 data byte> Read Copy Scratchpad response

TX Reset Reset pulse

RX Presence Presence pulse, done

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Rainbow-electronics DS2422 Bedienungsanleitung Seite 13