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SML2108F датащи(PDF) 13 Page - Summit Microelectronics, Inc. |
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SML2108F датащи(HTML) 13 Page - Summit Microelectronics, Inc. |
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13 / 21 page ![]() 13 2053 2.2 11/07/00 SML2108 SUMMIT MICROELECTRONICS, Inc. PRELIMINARY BUS INTERFACE GENERAL DESCRIPTION The I2C bus is a two-way, two-line serial communication between different integrated circuits. The two lines are: a serial Data line (SDA) and a serial Clock line (SCL). All Summit Microelectronics parts support a 100kHz clock rate, and some support the alternative 400kHz clock. Check the AC Electrical Table for the value of fSCL. The Figure 8. I2C Data Timing SDA line must be connected to a positive supply by a pull- up resistor located on the bus. Summit parts have a Schmitt input on both lines. See Figure X1 and Table X1 for waveforms and timing on the bus. One bit of Data is transferred during each Clock pulse. The Data must remain stable when the Clock is high. Table 1. I2C Data Timing 2053 Table01 1.0 l o b m y Sr e t e m a r a Ps n o i t i d n o C. n i M. x a Ms t i n U f L C S y c n e u q e r f k c o l c L C S 00 0 1z H k t W O L d o i r e p w o l k c o l C 7 . 4s µ t H G I H d o i r e p h g i h k c o l C 0 . 4s µ t F U B e m i t e e r f s u Bn o i s s i m s n a r t w e n e r o f e B7 . 4s µ t A T S : U S e m i t p u t e s n o i t i d n o c t r a t S 7 . 4s µ t A T S : D H e m i t d l o h n o i t i d n o c t r a t S 0 . 4s µ t O T S : U S e m i t p u t e s n o i t i d n o c p o t S 7 . 4s µ t A A t u p t u o d il a v o t e g d e k c o l C) n e l c y c ( A D S d il a v o t w o l L C S3 . 05 . 3s µ t H D e m i t d l o h t u O a t a De g n a h c A D S o t ) 1 + n e l c y c ( w o l L C S3 . 0s µ t R e m i t e s i r A D S d n a L C S 0 0 0 1s n t F e m i t ll a f A D S d n a L C S 0 0 3s n t T A D : U S e m i t p u t e s n I a t a D 0 5 2s n t T A D : D H e m i t d l o h n I a t a D 0s n I TA D S d n a L C S r e t li f e s i o Nn o i s s e r p p u s e s i o N0 0 1s n t R W e m i t e l c y c e t i r W 5s m tF tR tLOW tHIGH tHD:SDA tSU:SDA tBUF tDH tHD:DAT tSU:DAT tSU:STO SCL SDA In SDA Out tAA 2053 Fig08 |
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