M16C65 Datasheet, PDF (548/829 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)
23.3.1.3 LSB First/MSB First Select Function
Use the UFORM bit in the UiC0 register (i = 0 to 2, 5 to 7) to select the bit order. Figure 23.7 shows
the Bit Order.
(1) UFORM bit in the UiC0 register = 0 (LSB first)
CLKi
TXDi
D0 D1 D2 D3 D4 D5 D6 D7
RXDi
D0 D1 D2 D3 D4 D5 D6 D7
(2) UFORM bit in the UiC0 register = 1 (MSB first)
CLKi
TXDi
D7 D6 D5 D4 D3 D2 D1 D0
RXDi
D7 D6 D5 D4 D3 D2 D1 D0
The above applies under the following conditions.
The CKPOL bit in the UiC0 register is 0 (transmit data output at the falling edge and
the receive data taken in at the rising edge of the transmit/receive clock), and
the UiLCH bit in the UiC1 register is 0 (no reverse).
i = 0 to 2, 5 to 7
Figure 23.7 Bit Order
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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