M32C80 Datasheet, PDF (341/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
24. Precautions (Serial I/O)
24.9.2 UART Mode
Set the UiERE bit (i=0 to 4) in the UiC1 register after setting the UiMR register.
24.9.3 Special Mode 1 (I²C Mode)
To generate the start condition, stop condition or restart condition, set the STSPSEL bit in the UiSMR4
register to "0" first. Then, change each condition generating bit (the STAREQ bit, STPREQ bit or
RSTAREQ bit) setting from "0" to "1" after going through a half cycle of the transfer clock.
Rev. 1.00 Nov. 01, 2005 ^{Page 322} of 330
REJ09B0271-0100