HT66F20 datasheet(65/298 Pages) HOLTEK

65 / 298 page

Rev. 1.90

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Rev. 1.90

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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

SLOW Mode to NORMAL Mode Switching

InSLOWModethesystemuseseithertheLXTorLIRClowspeedsystemoscillator.Toswitch

backtotheNORMALMode,wherethehighspeedsystemoscillatorisused,theHLCLKbitshould

besetto"1"orHLCLKbitis"0",butCKS2~CKS0issetto"010","011","100","101","110",or

"111".Asacertainamountoftimewillberequiredforthehighfrequencyclocktostabilise,the

statusoftheHTObitischecked.Theamountoftimerequiredforhighspeedsystemoscillator

stabilizationdependsuponwhichhighspeedsystemoscillatortypeisused.

NO RM AL M ode

SL EEP0 M od e

SL EEP1 M od e

ID LE 0 M ode

ID LE 1 M ode

SL OW M ode

CK S2 ~C KS 0 ¹ 000 B, 0 01 B as H LC LK =0

or H LC LK =1

WD T and L V D ar e al l of f

ID LE N = 0

HA LT i ns tr uc ti on is e xe cu te d

WD T or L V D is o n

ID LE N = 0

HA LT i ns tr uc ti on is e xe cu te d

ID LE N = 1, F SYSO N= 0

HA LT i ns tr uc ti on i s ex ec ut ed

ID LE N = 1, F SYSO N= 1

HA LT i ns tr uc ti on is e xe cu te d

HT66F20 Datasheet(PDF) 65 Page - Holtek Semiconductor Inc