ADC 6021 Dokumentacja Pobierz pdf (Strona 68)

MYXPM6021*

Revision 1.1 - 10/21/14

*Advanced information. Subject to change without notice.

MYXPM6021*

Form #: CSI-D-685 Document 011

11 External EEPROM Controller

11.1 Overview

Duringtheinitialpower-onsequencethecontentoftheOTPiscopiedintothesequencerexecutionregisters.Sincethe

OTP registerscan only be programmed during the manufacturing & testing process, the EEPROM controllerfunction

providesthepossibilityofoverwritingthesequencerexecutionregistersintheeldand/orasbackup.

Duringinitialpower-ontheEEPROMaccesswillalwaysbeinterrogated.EEPROMreadingandregistercopyingdepend

onavalidsignatureinsidetheEEPROM.ThereforetheEEPROMhastobesuppliedfromadedicatedexternalpowerrail

ordirectlyfromthemainbattery.Ifavalidsignatureisnotread,MYXPM6021operateswiththeregistersettingbasedon

theOTPregisters.

11.2 Electrical Characteristics

Table 41: EEPROM Signal Electrical Specications

Parameter Min Nom Max Units Notes

Voltage 1.71 1.8 1.89 V At pin

Vil 0.3*VDD1 V

Vih 0.7*VDD1 V

Vhys 0.1 V

Vol 0.2*VDD1 V

Cpin 2 5 pF

fmax 125 kHz

Trise_fs 20 300 ns Pull-up resistor is integrated

in MYXPM6021

Tfall_fs 20 300 ns Full Speed Operation

Tr/Tf 30 70 % Measurement Points

11.3 Functions

• TheinternalCLKGENprovidesa125kHzclocksignaltotheEEPROMI2Cmasterclockoutput.

• AnEEPROMreadisinternallyinitiatedbyMYXPM6021powersequencestatemachine.

• EEPROMinitialaddressEEPROM_SIGN_ADDR,denedbyRegisterBitwrittenbyOTPisreadrsttoseeif

EEPROMisconnectedanddataatinitialaddressiscorrect.Ifoneofthesetwoconditionsisnotfullled,EEPROM

datawillnotbecopiedintoanyregisters.

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 112 113

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ADC 6021 Dokumentacja Strona 68