RL78/G15 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0959EJ0110 Rev.1.10 Page 363 of 765
Mar 7, 2023
12.1 Functions of Serial Array Unit
Each serial interface supported by the RL78/G15 has the following features.
12.1.1 Simplified SPI (CSI00, CSI01)
Data is transmitted or received in synchronization with the serial clock (SCK) output from the master.
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 12.5 Operation of Simplified SPI (CSI00, CSI01) 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
Note 1
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 1. Set up the transfer rate within a range satisfying the SCK cycle time (t
KCY
). For details, see CHAPTER 23
ELECTRICAL SPECIFICATIONS (T
A
= −40 to +85°C) and CHAPTER 24 ELECTRICAL SPECIFICATIONS
(T
A
= −40 to +105°C, T
A
= −40 to +125°C).
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