M16C65 Datasheet, PDF (535/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
23. Serial Interface UARTi (i = 0 to 2, 5 to 7)
NCH (Data Output Select Bit) (b5)
TXD2/SDA2 and SCL2 are N-channel open-drain outputs. They cannot be set to CMOS output.
Nothing is assigned in the NCH bit in the U2C0 register. If necessary, set to 0.
This function is used to set P-channel transistor of the COMS output buffer always off, but not to
change pins TXDi/SDAi and SCLi to open-drain output completely.
Check electrical characteristics for the input voltage range.
UFORM (Bit Order Select Bit) (b7)
The UFORM bit is enabled when bits SMD2 to SMD0 in the UiMR register are 001b (clock synchronous
serial I/O mode), or 101b (UART mode, 8-bit character data).
Set the UFORM bit to 1 when bits SMD2 to SMD0 are 010b (I²C mode), and to 0 when bits SMD2 to
SMD0 are 100b (UART mode, 7-bit character data) or 110b (UART mode, 9-bit character data).
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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