Holtek HT66F30 User Manual

Rev. 2.50 46 June 22, 2017 Rev. 2.50 47 June 22, 2017
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
EEC Register
Bit 7 6 5 4 3 2 1 0
Name — — — — WREN WR RDEN RD
R/W — — — — R/W R/W R/W R/W
POR — — — — 0 0 0 0
Bit7~4 Unimplemented,readas"0"
Bit3 WREN:DataEEPROMWriteEnable
0:Disable
1:Enable
ThisistheDataEEPROMWriteEnableBitwhichmustbesethighbeforeData
EEPROMwriteoperationsarecarriedout.ClearingthisbittozerowillinhibitData
EEPROMwriteoperations.
Bit2 WR:EEPROMWriteControl
0:Writecyclehasnished
1:Activateawritecycle
ThisistheDataEEPROMWriteControlBitandwhensethighbytheapplication
programwillactivateawritecycle.Thisbitwillbeautomaticallyresettozerobythe
hardwareafterthewritecyclehasnished.Settingthisbithighwillhavenoeffectif
theWRENhasnotrstbeensethigh.
Bit1 RDEN:DataEEPROMReadEnable
0:Disable
1:Enable
ThisistheDataEEPROMReadEnableBitwhichmustbesethighbeforeData
EEPROMreadoperationsarecarriedout.ClearingthisbittozerowillinhibitData
EEPROMreadoperations.
Bit0 RD:EEPROMReadControl
0:Readcyclehasnished
1:Activateareadcycle
ThisistheDataEEPROMReadControlBitandwhensethighbytheapplication
programwillactivateareadcycle.Thisbitwillbeautomaticallyresettozerobythe
hardwareafterthereadcyclehasnished.Settingthisbithighwillhavenoeffectif
theRDENhasnotrstbeensethigh.
Note:TheWREN,WR,RDENandRDcannotbesetto"1"atthesametimeinoneinstruction.
TheWRandRDcannotbesetto"1"atthesametime.

Holtek HT66F30 Specifications

General

Brand	Holtek
Model	HT66F30
Category	Computer Hardware
Language	English