M62420SP/ FP/ AFP

Rev.1.0, Sep.17.2003, page 10 of 16

DATA and CLOCK

CAUTION

S D A (IN)

S C L

S D A (OUT)

1

2 ~ 7

8

9

S

P

ACK

start

acknowledge

stop

start

This term is defined by SDA(in) falling edge at SCL H .

This term is defined by SDA(in) rising edge at SCL H .

stop

The SDA(IN) level never change at SCK=H

except start and stop .

The SDA(IN) is enabled at SCL rising edge and H .

data transmisson

acknowledge

Transmitter must send H during ninth clock pulse of SCL .

The case of finished receiving , the receiver replies L synchronized to

falling edge of eighth pulse . And restart receiving the transmitted data

synchronized to falling edge of ninth pulse .