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Serial Interface
13.1 Overview
This microcontroller has three types of internal serial interfaces. One is a general-purpose serial interface for which
clock synchronous mode, UART mode, or I2C mode can be specified; this interface supports one channel. The
second interface is a clock synchronous serial interface that supports two channels. The third interface is UART
serial interface that supports one channel.
Transmission interrupt 0
Reception interrupt 0
IOCLK
Timer 3 underflow
Timer 9 underflow
Transmission interrupt 2
Reception interrupt 2
Transmission interrupt 1
Reception interrupt 1
IOCLK
Timer 2 underflow
Timer 8 underflow
Transmission interrupt 3
Reception interrupt 3
13-2
General-purpose serial interface
Transmitter
Receiver
Clock sync-only serial interface (n = 2)
Transmitter
Receiver
Clock synchronous serial interface (n = 1)
Transmitter
Receiver
Start-stop sync-only serial interface
Transmitter
Receiver
Fig. 13-1-1 Structure Diagram
TXD
TXC
RXC
RXD
TXD
TXC
RXC
RXD
TXD
TXC
RXC
RXD
TXD
TXC
RXC
RXD
SBO0
SBT0
SBI0
SBO2
SBT2
SBI2
SBO1
SBT1
SBI1
SBO3
SBT3
SBI3
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