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HT66F20 Datasheet(PDF) 188 Page - Holtek Semiconductor Inc |
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HT66F20 Datasheet(HTML) 188 Page - Holtek Semiconductor Inc |
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188 / 298 page  Rev. 1.90 188 �e���a�� 18� �01� Rev. 1.90 189 �e���a�� 18� �01� 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 Registers TherearethreeinternalregisterswhichcontroltheoveralloperationoftheSPIinterface.Theseare theSIMDdataregisterandtworegistersSIMC0andSIMC2.NotethattheSIMC1registerisonly usedbytheI2Cinterface. Register Name Bit 7 6 5 4 3 2 1 0 SIMC0 SIM� SIM1 SIM0 PCKEN PCKP1 PCKP0 SIMEN — SIMD D7 D6 D5 D4 D� D� D1 D0 SIMC� D7 D6 CKPOLB CKEG MLS CSEN WCOL TR� SIM Registers List TheSIMDregisterisusedtostorethedatabeingtransmittedandreceived.Thesameregisterisused byboththeSPIandI2Cfunctions.BeforethedevicewritesdatatotheSPIbus,theactualdatato betransmittedmustbeplacedintheSIMDregister.AfterthedataisreceivedfromtheSPIbus,the devicecanreaditfromtheSIMDregister.AnytransmissionorreceptionofdatafromtheSPIbus mustbemadeviatheSIMDregister. SIMD Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D� D� D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR × × × × × × × × “x”: �nknown TherearealsotwocontrolregistersfortheSPIinterface,SIMC0andSIMC2.NotethattheSIMC2 registeralsohasthenameSIMAwhichisusedbytheI2Cfunction.TheSIMC1registerisnotused bytheSPIfunction,onlybytheI2Cfunction.RegisterSIMC0isusedtocontroltheenable/disable functionandtosetthedatatransmissionclockfrequency.AlthoughnotconnectedwiththeSPI function,theSIMC0registerisalsousedtocontrolthePeripheralClockPrescaler.RegisterSIMC2 isusedforothercontrolfunctionssuchasLSB/MSBselection,writecollisionflagetc. |
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