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ICS9248-189 Datasheet(PDF) 2 Page - Integrated Circuit Systems |
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ICS9248-189 Datasheet(HTML) 2 Page - Integrated Circuit Systems |
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2 / 15 page ![]() 2 ICS9248-189 Advance Information Third party brands and names are the property of their respective owners. General Description The ICS9248-189 is a main clock synthesizer chip for AMD-K7 based note book systems with VIA style chipset. This provides all clocks required for such a system. Spread spectrum may be enabled through I 2C programming. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248-189 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations. Serial programming I 2C interface allows changing functions, stop clock programming and frequency selection. Pin Descriptions Notes: 1: Internal Pull-up Resistor of 120K to 3.3V on indicated inputs 2: Bidirectional input/output pins, input logic levels are latched at internal power-on-reset. Use 10Kohm resistor to program logic Hi to VDD or GND for logic low. R E B M U N N I P E M A N N I PE P Y TN O I T P I R C S E D , 4 2 , 4 1 , 6 , 1 3 4 , 5 3 , 0 3 D D VR W PV 3 . 3 l a n i m o n , y l p p u s r e w o P 2 1 XN I k c a b d e e f d n a ) F p 6 3 ( p a c d a o l l a n r e t n i s a h , t u p n i l a t s y r C . 2 X m o r f r o t s i s e r 3 2 XT U O d a o l l a n r e t n i s a H . z H M 8 1 3 . 4 1 y l l a n i m o n , t u p t u o l a t s y r C . ) F p 6 3 ( p a c 4 2 S F 2 , 1 N It u p n i d e h c t a l , n i p t c e l e s y c n e u q e r F F _ K L C I C PT U O r e w o p r o f # P O T S _ I C P y b d e t c e f f a t o n k c o l c I C P g n i n n u r e e r F . t n e m e g a n a m 5 1 S F 2 , 1 N It u p n i d e h c t a l , n i p t c e l e s y c n e u q e r F 0 K L C I C PT U Ot u p t u o k c o l c I C P 5 4 , 4 4 , 4 3 , 1 3 , 1 2 , 3 1 , 7 D N GR W Pd n u o r G 8 , 9 , 0 1 , 1 1 , 2 1 , 5 1 ) 1 : 6 ( K L C I C PT U Os t u p t u o k c o l c I C P 6 1 # P O T S _ M A R D S 1 N I , l e v e l 0 c i g o l t a s k c o l c F _ M A R D S e h t s e d i s e b s M A R D S l l a s p o t S . w o l t u p n i n e h w 7 1# P O T S _ K L C I C P 1 N I , l e v e l 0 c i g o l t a s k c o l c F _ K L C I C P e h t s e d i s e b s K L C I C P l l a s p o t S . w o l t u p n i n e h w 8 1 N I R E F F U BN I. s t u p t u o M A R D S r o f s r e f f u B t u o n a F o t t u p n I 9 1 D D V AR W PV 3 . 3 U P C & , e r o c r o f y l p p u S 0 2 D N G AR W Pd n u o r g g o l a n A 2 2 0 S F 2 , 1 N It u p n i d e h c t a l , n i p t c e l e s y c n e u q e r F z H M 8 4T U Ok c o l c t u p t u o z H M 8 4 3 2 # 8 4 _ 4 2 L E S 2 , 1 N Iz H M 8 4 r o 4 2 t c e l e s o t t u p n i c i g o L z H M 8 4 _ 4 2T U Ot u p t u o k c o l c z H M 8 4 / z H M 4 2 5 2 A T A D SO / II r o f n i p a t a D 2 t n a r e l o t V 5 y r t i u c r i c C 6 2K L C SN II f o n i p k c o l C 2 t n a r e l o t V 5 y r t i u c r i c C 7 2 F _ M A R D ST U O r o f # P O T S _ M A R D S y b d e t c e f f a t o n k c o l c M A R D S g n i n n u r e e r F . t n e m e g a n a m r e w o p 7 3 , 6 3 , 3 3 , 2 3 , 9 2 , 8 2 ) 0 : 5 ( M A R D ST U O n i p N I R E F F U B m o r f s t u p t u o r e f f u B t u o n a F , s t u p t u o k c o l c M A R D S . ) t e s p i h c y b d e l l o r t n o c ( 8 3 # P O T S _ K L C 1 N I 0 T _ K L C U P C d n a L A T X t p e c x e w o l e v i t c a , p i h c n w o d s r e w o P . 0 C K L C U P C & # D PN I e c i v e d e h t n w o d r e w o p o t d e s u n i p t u p n i w o l e v i t c a s u o n o r h c n y s A O C V e h t d n a d e l b a s i d e r a s k c o l c l a n r e t n i e h T . e t a t s r e w o p w o l a o t n i t o n l l i w n w o d r e w o p e h t f o y c n e t a l e h T . d e p p o t s e r a l a t s y r c e h t d n a . s m 3 n a h t r e t a e r g e b 9 3 # P O T S _ U P C , 1 N IS C _ K L C U P C s p o t s y l n O 0 4 0 C K L C U P CT U O n e p o s i h T . t u p t u o U P C r i a p l a i t n e r e f f i d f o k c o l c " y r a t n e m e l p m o C " . p u - l l u p V 5 . 1 l a n r e t x e n a s d e e n s t u p t u o n i a r d 1 4 0 T K L C U P CT U O n i a r d n e p o e s e h T . s t u p t u o U P C r i a p l a i t n e r e f f i d f o s k c o l c " e u r T " . p u - l l u p V 5 . 1 l a n r e t x e n a d e e n s t u p t u o 2 4 S C _ K L C U P CT U Ot e s p i h c e h t o t k c o l c U P C 6 4 2 F E RT U Ok c o l c e c n e r e f e r z h M 8 1 3 . 4 1 3 S F 2 , 1 N It u p n I d e h c t a l , n i p t c e l e s y c n e u q e r F 8 4 , 7 4 ) 0 : 1 ( 0 F E RT U Ok c o l c e c n e r e f e r z h M 8 1 3 . 4 1 |
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