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MYXPM6021*

Revision 1.1 - 10/21/14

*Advanced information. Subject to change without notice.

MYXPM6021*

Form #: CSI-D-685 Document 011

10 I2C Interface

10.1 Overview

The MYXPM6021 is a slave-only device that is mastered by the SoC. It resides off the SoC’s I2C. The slave device

implementedonMYXPM6021sideisanasynchronousimplementationandwillsupportthehighspeedmode(3.4MHz).

SomeofthemainfeaturesfortheI2Cslaveare:

• MYXPM6021isaccessedusinga7-bitaddressingscheme.

• Theinterfacedrawsminimumpowerwhennotactivelyreading/writingregisters.

• Theslaveadaptstotheincomingfrequencywithoutanycommunicationastheprotocolforfastmodeandhigh

speedmodeisthesame.

• 2SlaveAddressaresupported.Eachaddressistargetinga256registerpageinsideMYXPM6021.

• Sequentialoffsetaccesseswithinasingletransaction(burstreadsandwrites)arenotrequired.

10.2 Slave Addresses

TheMYXPM6021supportsthestandardI2Creadandwritefunctions.Thecongurationregisterspaceisdividedinto

two256-bytepartitions.TheMYXPM6021supportsve7-bitdeviceaddressestoaccesseachofthe256bytepartitions.

Notethatin8-bitformat,theseaddressescorrespondto0xBCand0xDCforwrites,and0xBDand0xDDforreads.

InordertoavoidconictwiththeassignedaddressestheslaveaddresseswillbeprogrammableviaOTP.

Table 39: I2C Slave Addresses

Slave Address Read Address Write Address

Device 1 0x5E 0xBC 0xBD

Device 2 0x6E 0xDC 0xDD

Theslaveaddressesneedtobelockedinordertoavoidthatsoftwarecanoverwritethemanddisablethecommunication.

10.3 Protocol

ReadsfromPMICregistersfollowthe“combinedprotocol”asdescribedintheI2Cspecication,inwhichtherstbyte

written is the register offset to be read, and the rstbyte read(after a repeat START condition) isthe data from that

registeroffset.Seetheguresbelowfordetails.Thefollowingdiagramscapturethedifferenthighspeedandfast-speed

transactionformat/protocol

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 112 113

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ADC 6021 Especificaciones Pagina 65