HT95R35 datasheet(45/73 Pages) HOLTEK

45 / 73 page

HT95R35

Rev. 1.00

October 7, 2009

M O D E R e g i s t e r

b 7

b 0

N o t i m p l e m e n t e d , r e a d a s " 0 "

M O D E 1 M O D E 0 U P E N

F r e q u e n c y u p c o n v e r s i o n t o g e n e r a t e 1 4 . 3 2 M H z e n a b l e

1 : e n a b l e

0 : d i s a b l e

3 2 7 6 8 H z o s c i l l a t o r e n a b l e w h i l e t h e H A L T i n s t r u c t i o n i s e x e c u t e

1 : d i s a b l e 3 2 7 6 8 H z o s c i l l a t o r ( I d l e m o d e )

0 : e n a b l e 3 2 7 6 8 H z o s c i l l a t o r ( S l e e p m o d e )

S y s t e m c l o c k s e l e c t

1 : s e l e c t H C L K a s C P U c l o c k s y s t e m

0 : s e l e c t 3 2 7 6 8 H z a s C P U c l o c k s y s t e m

MODE Register

Operation Mode, Power-down and Wake-up

There are four operational modes, known as the idle mode, sleep mode, green mode, and normal mode. The chosen

mode is selected using the MODE0, MODE1 and UPEN bits in the MODE register but also depends upon whether the

HALT instruction has been executed or not.

HALT

Instruction

MODE1

MODE0

UPEN

Operation

Mode

32768Hz

HCLK

System

Clock

Not executed

Normal

HCLK

Not executed

Green

OFF

32768Hz

Executed

Sleep

OFF

Stopped

Executed

Idle

OFF

Stopped

Note:

²X² means don¢t care

MODE0 will be cleared to 0 automatically after wake-up from Idle Mode.

HCLK is frequency from PLL, which is 3.58MHz, 7.16MHz, 10.74MHz or 14.32MHz.

M O D E _ 1 R e g i s t e r

b 7

b 0

F 0

F 1

H C L K c l o c k s e l e c t

F 1

F 0

N o t i m p l e m e n t e d , r e a d a s " 0 "

3 . 5 8 M H z ( d e f a u l t )

7 . 1 6 M H z

1 0 . 7 4 M H z

1 4 . 3 2 M H z

MODE_1 Register

HT95R35 Datasheet(PDF) 45 Page - Holtek Semiconductor Inc

HT95R35 Datasheet(HTML) 45 Page - Holtek Semiconductor Inc

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