RL78/G13 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0146EJ0100 Rev.1.00 677
Sep 22, 2011
12.8 Operation of Simplified I
2
C (IIC00, IIC01, IIC10, IIC11, IIC20, IIC21, IIC30, IIC31) Communication
This is a clocked communication function to communicate with two or more devices by using two lines: serial clock
(SCL) and serial data (SDA). This communication function is designed to execute single communication with devices such
as EEPROM, flash memory, and A/D converter, and therefore, can be used only by the master.
Make sure by using software, as well as operating the control registers, that the AC specifications of the start and stop
conditions are observed.
[Data transmission/reception]
• Master transmission, master reception (only master function with a single master)
• ACK output function
Note
and ACK detection function
• Data length of 8 bits
(When an address is transmitted, the address is specified by the higher 7 bits, and the least significant bit is
used for R/W control.)
• Manual generation of start condition and stop condition
[Interrupt function]
• Transfer end interrupt
[Error detection flag]
• Overrun error
• Parity error (ACK error)
* [Functions not supported by simplified I
2
C]
• Slave transmission, slave reception
• Arbitration loss detection function
• Wait detection function
Note When receiving the last data, ACK will not be output if 0 is written to the SOEmn (SOEm register) bit and serial
communication data output is stopped. See the processing flow in 12.8.3 (2) for details.
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), mn = 00 to 03, 10 to 13
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