I 2 C Bus Pin Functions; I 2 C Bus Definitions And Control Methods - NEC V850E/Dx3 Preliminary User's Manual

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I C Bus (IIC)
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18.5 I C Bus Pin Functions
The serial clock pin (SCLn) and serial data bus pin (SDAn) are configured as
follows.
SCLn
SDAn
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
Figure 18-4 Pin configuration diagram
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18.6 I C Bus Definitions and Control Methods
The following section describes the I
and the signals used by the I
Preliminary User's Manual U17566EE1V2UM00
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.
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.
PORTV
DD
SCLn SCLn
PORTV
DD
SDAn SDAn
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C bus's serial data communication format
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C bus. The transfer timing for the "start
Chapter 18
Slave device
(Clock output)
Clock input
Data output
Data input
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