Renesas R8C/Tiny Series Manuel télécharger pdf (Page 178)

R8C/10 Group 19. Usage Notes

Rev.1.20 Jan 27, 2006 page 168 of 180

REJ09B0019-0120

19.5 Serial Interface

(1) When reading data from the UiRB (i=0,1) register even in the clock asynchronous serial I/O mode or

in the clock synchronous serial I/O mode. Be sure to read data in 16-bit unit. When the high-byte of

the UiRB register is read, the PER and FER bits of the UiRB register and the RI bit of the UiC1

Example (when reading receive buffer register):

MOV.W 00A6H, R0 ; Read the U0RB register

(2) When writing data to the UiTB register in the clock asynchronous serial I/O mode with 9-bit transfer

data length, data should be written high-byte first then low-byte in 8-bit unit.

Example (when reading transmit buffer register):

MOV.B #XXH, 00A3H ; Write the high-byte of U0TB register

MOV.B #XXH, 00A2H ; Write the low-byte of U0TB register

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Renesas R8C/Tiny Series Manuel Page 178