RL78/G1H CHAPTER 18 RF TRANSCEIVER
R01UH0575EJ0120 Rev. 1.20 Page 653 of 920
Dec 22, 2016
18.5.3 Communication Format
Data communication is performed in the communication format of 8-bit unit serial communication. The basic
communication format consists of 2 bytes of address and R/W control and 1 byte of data, 3 bytes in total. When
the SEN internal pin remains at the low level after reaching 3 bytes of the basic communication, the data cycle
occurs in the 4th byte or later. In this case, the address is automatically incremented, and the data of the 4th byte
or later is written in the incremented address or read out.
Figure 18 - 104 shows the serial communication format, and Table 18 - 11 shows the description of the format.
Figure 18 - 104 Internal Serial Communication Format
Basic communication format
Consecutive access (automatic increment)
Note 1. Data is written in the address specified in the 1st or 2nd byte or read.
Note 2. The address is automatically incremented for each byte, and the data is written in the incremented address or read
during the consecutive access.
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