BAT32G1x9 user manual | Chapter 20 Serial interface IICA
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Rev.1.02
t
R
: The
rise time of the
SDAAn
signal and
the
SCLAn
signal
f
MCK
: IICA
operating clock frequency
3. n=0.1
20.5 Definition and control method of the
I2
C-bus
The following describes the serial data communication format and the signals used for the I2 C-bus.
The Start Condition, Address, Data generated on the serial data bus of the
I2
C-bus The respective
transmission timings for and "Stop Condition" are shown in the following figure.
Figure 20-12
the 12 I2
C-bus
SCLAn
SDAAn
start condition
address
ACK
ACK
ACK
data
data
stop condition
generation
starts
R/W
The master generates start conditions, slave addresses, and stop conditions.
Both the master and slave devices can generate a reply (ACK) (in general, the receiver outputs 8 bits of data).
The master device continuously outputs a serial clock (SCLAn). However, the slave can extend the low level of the
SCLAn pin during and insert a wait.