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CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
8. Operation of I2C
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
326
8.2. Operation for I
2
C Interface Communication
Operation for I
2
C interface communication is shown.
The I
2
C interface handles communication using two bidirectional bus lines, a serial data line (SDA), and a
serial clock line (SCL).
8.2.1. I
2
C Bus Start Condition
The condition for the I
2
C bus to be activated is as follows:
Figure 8-2 Start Condition
8.2.2. I
2
C Bus Stop Condition
The condition for the I
2
C bus to stop is as follows:
Figure 8-3 Stop Condition
8.2.3. I
2
C Bus Repeated Start Condition
The condition for the I
2
C bus to initiate a repeated start is as follows:
Figure 8-4 Repeated Start Condition
SDA
SCL
Start condition
SDA
SCL
Stop condition
SDA
SCL
ACK (Acknowledge) Repeated start condition
MB91520 Series
MN705-00010-1v0-E
1639