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HT66F4530 Datasheet(PDF) 134 Page - Holtek Semiconductor Inc |
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HT66F4530 Datasheet(HTML) 134 Page - Holtek Semiconductor Inc |
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134 / 224 page  Rev. 1.00 134 De�e��e� �1� �01� Rev. 1.00 135 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers SPI Control Registers TherearealsotwocontrolregistersfortheSPIinterface,SIMC0andSIMC2.NotethattheSIMC2 registeralsohasthenameSIMAwhichisusedbytheI2Cfunction.TheSIMC0registerisusedto controltheenable/disablefunctionandtosetthedatatransmissionclockfrequency.TheSIMC2 registerisusedforothercontrolfunctionssuchasLSB/MSBselection,writecollisionflagetc. • SIMC0 Register Bit 7 6 5 4 3 2 1 0 Na�e SIM� SIM1 SIM0 — SIMDEB1 SIMDEB0 SIMEN SIMICF R/W R/W R/W R/W — R/W R/W R/W R/W POR 1 1 1 — 0 0 0 0 Bit7~5 SIM2~SIM0:SIMOperatingModeControl 000:SPImastermode;SPIclockisfSYS/4 001:SPImastermode;SPIclockisfSYS/16 010:SPImastermode;SPIclockisfSYS/64 011:SPImastermode;SPIclockisfSUB 100:SPImastermode;SPIclockisPTM0CCRPmatchfrequency/2 101:SPIslavemode 110:I2Cslavemode 111:Unusedmode ThesebitssetuptheoveralloperatingmodeoftheSIMfunction.Aswellasselecting iftheI2CorSPIfunction,theyareusedtocontroltheSPIMaster/Slaveselection andtheSPIMasterclockfrequency.TheSPIclockisafunctionofthesystemclock butcanalsobechosentobesourcedfromPTM0andfSUB.IftheSPISlaveModeis selectedthentheclockwillbesuppliedbyanexternalMasterdevice. Bit4 Unimplemented,readas"0" Bit3~2 SIMDEB1~SIMDEB0:I2CDebounceTimeSelection TheSIMDEB1~SIMDEB0bitsareonlyusedintheI2Cmodeandthedetailed definitionisdescribedintheI2Csection. Bit1 SIMEN:SIMEnableControl 0:Disable 1:Enable Thebitistheoverallon/offcontrolfortheSIMinterface.WhentheSIMENbitis clearedtozerotodisabletheSIMinterface,theSDI,SDO,SCKandSCS,orSDAand SCLlineswilllosetheirSPIorI2CfunctionandtheSIMoperatingcurrentwillbe reducedtoaminimumvalue.WhenthebitishightheSIMinterfaceisenabled.Ifthe SIMisconfiguredtooperateasanSPIinterfaceviatheSIM2~SIM0bits,thecontents oftheSPIcontrolregisterswillremainattheprevioussettingswhentheSIMENbit changesfromlowtohighandshouldthereforebefirstinitialisedbytheapplication program.IftheSIMisconfiguredtooperateasanI2CinterfaceviatheSIM2~SIM0 bitsandtheSIMENbitchangesfromlowtohigh,thecontentsoftheI2Ccontrolbits suchasHTXandTXAKwillremainattheprevioussettingsandshouldthereforebe firstinitialisedbytheapplicationprogramwhiletherelevantI2CflagssuchasHCF, HAAS,HBB,SRWandRXAKwillbesettotheirdefaultstates. Bit0 SIMICF:SIMSPIIncompleteFlag 0:SIMSPIincompleteconditionisnotoccurred 1:SIMSPIincompleteconditionisoccurred ThisbitisonlyavailablewhentheSIMisconfiguredtooperateinanSPIslavemode. IftheSPIoperatesintheslavemodewiththeSIMENandCSENbitsbothbeingset to1buttheSCSlineispulledhighbytheexternalmasterdevicebeforetheSPIdata transferiscompletelyfinished,theSIMICFbitwillbesetto1togetherwiththeTRF bit.Whenthisconditionoccurs,thecorrespondinginterruptwilloccuriftheinterrupt functionisenabled.However,theTRFbitwillnotbesetto1iftheSIMICFbitisset to1bysoftwareapplicationprogram. |
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