RL78/G15 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0959EJ0110 Rev.1.10 Page 368 of 765
Mar 7, 2023
12.2.1 Shift Register
This is a 9-bit register that converts parallel data into serial data or vice versa.
In case of the UART communication of nine bits of data, nine bits (bits 0 to 8) are used.
During reception, it converts data input to the serial pin into parallel data. When data is transmitted, the value set to this
register is output as serial data from the serial output pin.
The shift register cannot be directly manipulated by program.
To read or write the shift register, use the lower 8 or 9 bits of serial data register mn (SDRmn).
8 7 6 5 4 3 2 1 0
Shift register
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