To Next Page

To Previous Page

Rev. 1.50 134 August 28, 2017 Rev. 1.50 135 August 28, 2017

HT66F0175/HT66F0185

A/D Flash MCU with EEPROM

HT66F0175/HT66F0185

A/D Flash MCU with EEPROM

SPI Communication

AftertheSPIinterfaceisenabledbysettingtheSIMENbithigh,thenintheMasterMode,when

dataiswrittentotheSIMDregister,transmission/receptionwillbeginsimultaneously.Whenthe

datatransferiscomplete,theTRFflagwillbesetautomatically,butmustbeclearedusingthe

applicationprogram.IntheSlaveMode,whentheclocksignalfromthemasterhasbeenreceived,

anydataintheSIMDregisterwillbetransmittedandanydataontheSDIpinwillbeshiftedinto

theSIMDregister.ThemastershouldoutputaSCSsignaltoenabletheslavedevicesbeforea

clocksignalisprovided.Theslavedatatobetransferredshouldbewellpreparedattheappropriate

momentrelativetotheSCSsignaldependinguponthecongurationsoftheCKPOLBbitandCKEG

bit.TheaccompanyingtimingdiagramshowstherelationshipbetweentheslavedataandSCSsignal

forvariouscongurationsoftheCKPOLBandCKEGbits.

TheSPImastermodewillcontinuetofunctionevenintheIDLE1ModeiftheselectedSPIclock

sourceisrunning.

   

 

     

   

   

   

 

 



  

       

   

SPI Master Mode Timing

  

  





  

       

   

       

SPI Slave Mode Timing – CKEG = 0

Holtek HT66F0175 User Manual

Questions and Answers: