ADM9240 View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

ADM9240

Low Cost Microprocessor System Hardware Monitor

ON Semiconductor 

ADM9240

SERIAL BUS INTERFACE

ADM9240

from the slave device. Transitions on the data line must

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Tahdedfraecsilsitwyitllobmea0k1e0h1a1r0d0w.ired changes to A1 and A0 allows the

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2. Dsaltaaveisdseevnicteo.ver the serial bus in sequences of nine clock

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3. Wohnelny ablyl dwahtatbtyhteesmhaasvterbaenedn srleaavde odrevwicrietstecna,nsthoapndcolen.di-

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Any nSuTmObPerconf dbiyttioesn.of data may be transferred over the serial

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Tpoewrfroitremdtahtae tfolloonweinogf tfhuencdteiovincse: data registers or read data

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Trheisgiissteilrlussetlreacted ibnyFthigeuAred2dar.esTshPeodinetveirceRaedgdisrtesrs. is sent over

tbrRinheyeTtbrRtgetheegyieehgserbitsgstniieu.setsbisaestsrTu.iletrseft.srThdooriTeaftl.lhololbtuoThefalielsbwerohftrsiewreweesrtaedsgrwdesttciieetdsrabodtdctiteynteabaotnridteyRnn.abntdd/RyoFbatt,d/yeioWtgwata,seiutsehwabrstiiteseyhcbhttthiot2yeechttahoi0eeai.ss.di0TaisstsdT.dthhosrtdTheetehroirsehedsedsrdiaseidesosstdivaaifnfoistocitatfnthfeolholtteothaoelbhlwdeioeneAbdewitewdnAdreeedtrrwddbesinrtdsrryeatbinresitlytesatsnwdeslstPsnatowedotoPnaatodiotttonaahdiotttneeaahvtrteeearr

2.puDlsaetsa, eisigshetnbtiotsveorf dthaetasfeorlilaolwbeudsbiny asenqauceknncoewsleodf gneinbeitclock internal data register.

pulses, eight bits of data followed by an acknowledge bit

1

9

1

9

SCL

SDA

0

1

0

1

1 A1 A0 R/W

D7

START BY

MASTER

and Pin 2 (A1) at power-up. These pinFsRAhMaEve1 internal 75

SERIAL BUS ADDRESS BYTE

ACK. BY

ADM9240

D6 D5 D4 D3 D2 D1 D0

FRAME 2

ADDRESS POINTER REGISTER BYTE

ACK. BY

ADM9240

1

9

SCL (CONTINUED)

SDA (CONTINUED)

D7 D6 D5 D4 D3 D2 D1 D0

ACK. BY STOP BY

ADM9240 MASTER

FRAME 3

DATA BYTE

Figure 2a. Writing a Register Address to the Address Pointer Register, then Writing Data to the Selected Register

REV.

0Figure

2a.

Writing

a

Register

Address

to the

Rev. 2 |

APadgde 7reosf s2–2P7| wo–winwt.eornsRemegi.ciosmter,

then

Writing

Data

to

the

Selected

Register

REV. 0

–7–

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