RL78/G13 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0146EJ0100 Rev.1.00 540
Sep 22, 2011
Notes 1. The number of bits used as the shift register and buffer register differs depending on the unit and channel.
• 20 to 64-pin products and mn = 00, 01: lower 9 bits
• 80, 100, 128-pin products and mn = 00, 01, 10, 11: lower 9 bits
• Other than above: lower 8 bits
2. The lower 8 bits of serial data register mn (SDRmn) can be read or written as the following SFR, depending
on the communication mode.
• CSIp communication … SIOp (CSIp data register)
• UARTq reception … RXDq (UARTq receive data register)
• UARTq transmission … TXDq (UARTq transmit data register)
• IICr communication … SIOr (IICr data register)
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), p: CSI number (p = 00, 01, 10, 11, 20, 21, 30, 31),
q: UART number (q = 0 to 3), r: IIC number (r = 00, 01, 10, 11, 20, 21, 30, 31)
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