HT68F13 datasheet(35/161 Pages) HOLTEK

35 / 161 page

NORMALModetoSLOWModeSwitching

When running in the NORMAL Mode, which uses the high speed system oscillator, and therefore

consumes more power, the system clock can switch to run in the SLOW Mode by set the HLCLK bit to

0 and set the CKS2~CKS0 bits to

²000B² or ²001B² in the SMOD register. This will then use the low

speed system oscillator which will consume less power. Users may decide to do this for certain

operations which do not require high performance and can subsequently reduce power consumption.

The SLOW Mode is sourced from the LIRC oscillator and therefore requires these oscillators to be

stable before full mode switching occurs. This is monitored using the LTO bit in the SMOD register.

HT68F13/HT68F14/HT68F15

EnhancedI/OFlashType 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

HT68F13 Datasheet(PDF) 35 Page - Holtek Semiconductor Inc