MS4515DO

MS4515DO

www.meas-spec.com

April 2012

13/19

Transmission STOP Condition (P):

The STOP condition is a unique situation on the bus created by the

master, indicating to the slaves the end of a transmission sequence (the bus is considered free after a STOP).

Acknowledge (ACK) / Not Acknowledge (NACK):

Each byte (8 bits) transmitted over the I

by an acknowledge condition from the receiver. This means that after the master pulls SCL low to complete the

transmission of the 8th bit, SDA will be pulled low by the receiver during the 9th bit time. If after transmission of

the 8th bit the receiver does not pull the SDA line low, this is considered to be a NACK condition.

If an ACK is missing during a slave to master transmission, the slave aborts the transmission and goes into idle

mode.

A HIGH to LOW transition on the SDA line while SCL is HIGH

SDA

SCL

START condition

A LOW to HIGH transition on the SDA line while SCL is HIGH

STOP condition

SDA

SCL

SDA

SCL

ACK

D7

D0

ACK

acknowledge

not acknowledge

Each byte is followed by an acknowledge or a not acknowledge,

generated by the receiver