I C Bus Mode Functions; Pin Configuration Diagram - NEC V850/SA1 mPD703015 Preliminary User's Manual

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10.3.3 I C bus mode functions
(1) Pin configuration
The serial clock pin (SCL) and serial data bus pin (SDA) are configured as follows.
SCL ................ 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.
SDA ................. 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
232
CHAPTER 10 SERIAL INTERFACE FUNCTION
Figure 10-12. Pin Configuration Diagram
V
DD
SCL
V
DD
SDA
Slave device
SCL
(Clock output)
Clock input
SDA
Data output
Data input