CHAPTER 14 SERIAL ARRAY UNIT
Page 324 of 920
14.1
Functions of Serial Array Unit
Each serial interface has the following features.
14.1.1
3-wire serial I/O (CSIp)
Data is transmitted or received in synchronization with the serial clock (SCK) output from the master channel.
3-wire serial communication is clocked communication performed by using three communication lines: one for
the serial clock (SCK), one for transmitting serial data (SO), one for receiving serial data (SI).
For details about the settings, see
14.5 Operation of 3-Wire Serial I/O (CSIp) Communication
.
[Data transmission/reception]
• Data length of 7 or 8 bits
• Phase control of transmit/receive data
• MSB/LSB first selectable
[Clock control]
• Master/slave selection
• Phase control of I/O clock
• Setting of transfer period by prescaler and internal counter of each channel
• Maximum transfer rate
During master communication:
Max. f
CLK
/4
During slave communication:
Max. f
MCK
/6
[Interrupt function]
• Transfer end interrupt/buffer empty interrupt
[Error detection flag]
• Overrun error
Note
Use the clocks within a range satisfying the SCK cycle time (t
KCY
) characteristics. For details, see
ELECTRICAL SPECIFICATIONS
.
Summary of Contents for RL78/G1H
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