HT66F13 datasheet(38/173 Pages) HOLTEK

38 / 173 page

SLOWModetoNORMALModeSwitching

In SLOW Mode the system uses the LIRC low speed system oscillator. To switch back to the

NORMAL Mode, where the high speed system oscillator is used, the HLCLK bit should be set to

²1²

or HLCLK bit is

²0² but CKS2~CKS0 is set to 010B, 011B, 100B, 101B, 110B or 111B. As a certain

amount of time will be required for the high frequency clock to stabilise, the status of the HTO bit is

checked. The amount of time required for high speed system oscillator stabilization depends upon

which high speed system oscillator type is used.

HT66F13/HT66F14/HT66F15

EnhancedA/DFlashType MCU

Rev.1.10

February9,2011

S L O W M o d e

S L E E P 0 M o d e

S L E E P 1 M o d e

I D E L 0 M o d e

I D L E 1 M o d e

N O R M A L M o d e

C K S 2 ~ C K S 0 = 0 0 x B &

H L C L K = 0

W D T a n d L V D a r e a l l o f f

I D L E N = 0

H A L T i n s t r u c t i o n i s e x e c u t e d

W D T o r L V D i s o n

I D L E N = 0

H A L T i n s t r u c t i o n i s e x e c u t e d

I D L E N = 1 , F S Y S O N = 0

H A L T i n s t r u c t i o n i s e x e c u t e d

I D L E N = 1 , F S Y S O N = 1

H A L T i n s t r u c t i o n i s e x e c u t e d

HT66F13 Datasheet(PDF) 38 Page - Holtek Semiconductor Inc