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CHAPTER 17 SERIAL INTERFACE IIC0 (
µ
PD780344Y, 780354Y SUBSERIES ONLY)
User’s Manual U15798EJ2V0UD
17.4 I
2
C Bus Mode Functions
17.4.1 Pin configuration
The serial clock pin (SCL0) and serial data bus pin (SDA0) are configured as follows.
(1) 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.
(2) 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.
Figure 17-7. Pin Configuration Diagram
V
DD0
V
SS0
V
SS0
V
SS0
V
SS0
SCL0
SDA0
SCL0
SDA0
V
DD0
Clock output
Master device
(Clock input)
Data output
Data input
(Clock output)
Clock input
Data output
Data input
Slave device
Содержание mPD780344 Series
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