Renesas RL78 Series User Manual page 420

RL78/G1D
13.5 Operation of 3-Wire Serial I/O (CSI00, CSI20, CSI21) 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]
● 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
During slave communication:
[Interrupt function]
● Transfer end interrupt/buffer empty interrupt
[Error detection flag]
● Overrun error
In addition, CSI00 of following channels supports the SNOOZE mode. When SCK input is detected while in the STOP
mode, the SNOOZE mode makes data reception that does not require the CPU possible.
Note Use the clocks within a range satisfying the SCK cycle time (t
CHAPTER 30 ELECTRICAL SPECIFICATIONS.
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
Note
/2 (CSI00 only)
CLK
Max. f /4
CLK
Max. f /6
MCK
CHAPTER 13 SERIAL ARRAY UNIT
) characteristics
KCY
For details, see
399