Datasheet

ISD5100 SERIES
Publication Release Date: Oct 31, 2008
- 71 - Revision 1.42
Start and stop conditions
Both data and clock lines remain HIGH when the interface bus is not busy. A HIGH-to-LOW transition
of the data line while the clock is HIGH is defined as the start condition (S). A LOW-to-HIGH transition
of the data line while the clock is HIGH is defined as the stop condition (P).
System configuration
A device generating a message is a ‘transmitter’; a device receiving a message is the ‘receiver’. Th
System Configuration
A device generating a message is a ‘transmitter’; a device receiving a message is the ‘receiver’. The
device that controls the message I sthe ‘master’ and the devices that are controlled by the master are
the ‘slaves’.
SDA
SCL
S
P
START condition STOP condition
Definition of START and STOP conditions
SDA
SCL
SDA
SCL
data line
stable;
data
v
a
li
d
changed
of data
a
ll
o
w
ed
Bit transfer on the I
2
C
-Bus