RL78/G1H
CHAPTER 18 RF TRANSCEIVER
Page 653 of 920
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
Cycle
Access destination
DO2
DI6
DI5
DI4
DI3
DO7 DO6 DO5 DO4 DO3
ࠉࠉ
n (nth byte)
Basic communication format
Consecutive access (automatic increment)
DI3
DI2
DI1
DI0
A4
A3
DO4 DO3 DO2 DO1
DI7
A6
A5
DO7 DO6 DO5
A9
DI4
DI1
DI0
DI7
DI6
DI5
DI2
A2
A1
A0
RW
RW
0
A8
A7
1st (1st byte)
2nd (2nd byte)
3rd (3rd byte)
B6 B5 B4 B3 B2 B1
Note 2
DO1 DO0
B7 B6 B5 B4 B3 B2 B1 B0 B7
Note 1
B0 B7 B6
B1 B0
B7 B6 B5 B4 B3
SEN internal pin
SOUT internal pin
SIN internal pin
SCLK internal pin
B2
B5 B4 B3 B2 B1 B0
DO0
A12
A11
A10
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.
Summary of Contents for RL78/G1H
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