GW Instek GLA-1000 Series User Manual - Manual (Page 90)

GLA User Manual
90
I
2
C Bus Analysis
Background
This function analyzes the widely popular I 2 C (Inter-Integrated
Circuit) bus protocol by extracting the attributes from the captured
data.
The bus consists of two lines, SDA (Serial Data Line) and SCL
(Serial Clock Line).
The Data consists of the following elements.
Start condition
Indicates the beginning of communication.
↓
Address
7-bit device address, MSB first.
↓
R/W
Read or Write acknowledge bit.
↓
ACK
Acknowledgement bit. Confirms reception
of the previous byte.
↓
Data
8-bit (one byte) data, MSB first. The
combination of ACK and Data is repeated
for the duration of the communication.
↓
Stop condition
Indicates the end of communication.
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