M16C80 Datasheet, PDF (170/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
20. UARTi Special Mode Register (i = 2 to 4)
1. Bus collision detect sampling clock select bit (Bit 4 of the UARTi special mode register)
0: Rising edges of the transfer clock
CLKi
TxDi/RxDi
Timer Ai
1: Timer A0 underflow
2. Auto clear function select bit of transmit enable bit (Bit 5 of the UARTi special mode
register)
CLKi
TxDi/RxDi
Bus collision
detect interrupt
request bit
Transmit
enable bit
3. Transmit start condition select bit (Bit 6 of the UARTi special mode register)
0: In normal state
CLKi
TxDi
Enabling transmission
With "1: falling edge of RxDi" selected
CLKi
TxDi
RxDi
Figure 20.3 Some other functions added
Rev.1.00 Aug. 02, 2005 ^{Page 159} of 329
REJ09B0187-0100