Renesas RL78/G10 - Operation of 3-Wire Serial I;O (CSI00, CSI01) Communication

RL78/G10 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0384EJ0311 Rev. 3.11 305
Dec 22, 2016
12.5 Operation of 3-Wire Serial I/O (CSI00, CSI01
Note
) Communication
This is a clocked communication function that uses three lines: serial clock (SCK) and serial data (SI and SO) lines.
[Data transmission/reception]
• Data length of 7 or 8 bits
• Phase control of transmit/receive data
• MSB/LSB first selectable
[Clock control]
• Phase control of I/O clock
• Setting of transfer period by prescaler and internal counter of each channel
• Maximum transfer rate
Note
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 CHAPTER 24
ELECTRICAL SPECIFICATIONS.
Unit Channel Used as CSI Used as UART
Used as Simplified I
2
C
0
0 CSI00 UART0 IIC00
1 CSI01
Note
−
3-wire serial I/O (CSI00, CSI01
Note
) performs the following seven types of communication operations.
• Master transmission (See 12.5.1.)
• Master reception (See 12.5.2.)
• Master transmission/reception (See 12.5.3.)
• Slave transmission (See 12.5.4.)
• Slave reception (See 12.5.5.)
• Slave transmission/reception (See 12.5.6.)
Note 16-pin products only.