HT66F20 datasheet(191/298 Pages) HOLTEK

191 / 298 page

Rev. 1.90

190

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Rev. 1.90

191

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HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

Enhanced A/D Flash Type 8-Bit MCU with EEPROM

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

Enhanced A/D Flash Type 8-Bit MCU with EEPROM

SPI Communication

AftertheSPIinterfaceisenabledbysettingtheSIMENbithigh,thenintheMasterMode,when

dataiswrittentotheSIMDregister,transmission/receptionwillbeginsimultaneously.Whenthe

datatransferiscomplete,theTRFflagwillbesetautomatically,butmustbeclearedusingthe

applicationprogram.IntheSlaveMode,whentheclocksignalfromthemasterhasbeenreceived,

anydataintheSIMDregisterwillbetransmittedandanydataontheSDIpinwillbeshiftedinto

theSIMDregister.ThemastershouldoutputanSCSsignaltoenabletheslavedevicebeforea

clocksignalisprovided.Theslavedatatobetransferredshouldbewellpreparedattheappropriate

momentrelativetotheSCSsignaldependingupontheconfigurationsoftheCKPOLBbitandCKEG

bit.TheaccompanyingtimingdiagramshowstherelationshipbetweentheslavedataandSCSsignal

forvariousconfigurationsoftheCKPOLBandCKEGbits.

TheSPIwillcontinuetofunctionevenintheIDLEMode.

SC K (C KP OL B= 1, C KE G= 0)

SI ME N, C SE N= 1

SI ME N= 1, C SE N= 0 (E xt er nal P ul l- Hi gh )

SC K (C KP OL B= 0 , C KE G= 0)

SC K (C KP OL B= 1 , C KE G= 1)

SC K (C KP OL B= 0 , C KE G= 1)

SD O (C KE G= 0)

SD O (C KE G= 1)

SC S

SD I Da ta C apt ur e

D7 /D 0D 6/ D1

D5 /D 2D 4/ D3 D3 /D 4D 2/ D5

D1 /D 6D 0/ D7

D7 /D 0D 6/ D1

D5 /D 2D 4/ D3 D3 /D 4D 2/ D5

D1 /D 6D 0/ D7

Wr it e to S IM D

SPI Master Mode Timing

SC K (C KP OL B= 1)

SC K (C KP OL B= 0)

SD O

SC S

SD I Da ta C apt ur e

D7 /D 0D 6/ D1

D5 /D 2D 4/ D3 D3 /D 4D 2/ D5

D1 /D 6D 0/ D7

Wr it e to S IM D

(S DO d oe s not c hange un ti l fi rs t SC K edge )

SPI Slave Mode Timing – CKEG=0

HT66F20 Datasheet(PDF) 191 Page - Holtek Semiconductor Inc

HT66F20 Datasheet(HTML) 191 Page - Holtek Semiconductor Inc

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