HT66F20 datasheet(187/298 Pages) HOLTEK

187 / 298 page

Rev. 1.90

186

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Rev. 1.90

187

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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

ThestatusoftheSPIinterfacepinsisdeterminedbyanumberoffactorssuchaswhetherthedevice

isinthemasterorslavemodeandupontheconditionofcertaincontrolbitssuchasCSENand

SIMEN.

ThereareseveralconfigurationoptionsassociatedwiththeSPIinterface.Oneoftheseisto

enabletheSIMfunctionwhichselectstheSIMpinsratherthannormalI/Opins.Notethatifthe

configurationoptiondoesnotselecttheSIMfunctionthentheSIMENbitintheSIMC0registerwill

havenoeffect.AnothertwoSPIconfigurationoptionsdetermineiftheCSENandWCOLbitsareto

beused.

SP I M ast er

SP I Sl av e

SC K

SD O

SD I

SC S

SC K

SD I

SD O

SC S

SPI Master/Slave Connection

Da ta B us

SD I Pi n

SD O Pi n

SI MD

Tx /R x Sh if t R egi st er

Bu sy

St at us

C onf i gur at io n

Op ti on

TR F Fl ag

E nabl e/ Di s abl e

W CO L Fl ag

Cl oc k

E dge/ Po la ri ty

C ont ro l

Cl oc k

S our ce S el ec t

f SY S

f TB C

TM 0 CCRP m at ch fr e quen cy/ 2

SC K Pi n

SC S Pi n

C onf i gur at io n

Op ti on

CS EN b it

E nabl e/ Di s abl e

CK EN b it

CK PO LB b it

SPI Bolck Diagram

HT66F20 Datasheet(PDF) 187 Page - Holtek Semiconductor Inc

HT66F20 Datasheet(HTML) 187 Page - Holtek Semiconductor Inc

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