Datasheet

V850ES/JG3 CHAPTER 17 I
2
C BUS
R01UH0015EJ0300 Rev.3.00 Page 557 of 870
Sep 30, 2010
17.5 I
2
C Bus Mode Functions
17.5.1 Pin configuration
The serial clock pin (SCL0n) and serial data bus pin (SDA0n) are configured as follows (n = 0 to 2).
SCL0n .................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.
SDA0n ................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 17-6. Pin Configuration Diagram
V DD
SCL0n
SDA0n
SCL0n
SDA0n
V DD
Clock output
Master device
(Clock input)
Data output
Data input
(Clock output)
Clock input
Data output
Data input
Slave device