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16.4 Functions
16.4.1 Pin configuration
The serial clock pin (SCL0) and serial data bus pin (SDA0) are configured as follows.
SCL0 .............. This pin is used for serial clock input and output.
This pin is an N-ch open-drain output for both master and slave devices. Input is Schmitt input.
SDA0 .............. This pin is used for serial data input and output.
This pin is an N-ch open-drain output for both master and slave devices. Input is Schmitt input.
Since outputs from the serial clock line and the serial data bus line are N-ch open-drain outputs, an external pull-up
resistor is required.
Master device
Clock output
(Clock input)
Data output
Data input
2
CHAPTER 16 I
C BUS
Figure 16-3. Pin Configuration Diagram
V
DD
SCL0
V
DD
SDA0
User's Manual U16896EJ2V0UD
Slave device
SCL0
(Clock output)
Clock input
SDA0
Data output
Data input
477
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