Renesas M16C/64C User Manual page 518

M16C/64C Group
23.3.2.2 LSB First/MSB First Select Function
As shown in Figure 23.14, the bit order can be selected by setting the UFORM bit in the UiC0 register.
This function is enabled when the character bit length is 8 bits.
(1) UFORM bit in the UiC0 register = 0 (LSB first)
CLKi
TXDi
RXDi
(2) UFORM bit in the UiC0 register = 1 (MSB first)
CLKi
TXDi
RXDi
i = 0 to 2, 5 to 7
The above assumes the following:
• 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).
• The UiLCH bit in the UiC1 register is 0 (not inverted).
• The STPS bit in the UiMR register is 0 (1 stop bit).
• The PRYE bit in the UiMR register is 1 (parity enabled).
ST: Start bit
P: Parity bit
SP: Stop bit
Figure 23.14 Bit Order
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
ST D0 D1 D2
ST D0 D1 D2
ST D7 D6 D5
ST D7 D6 D5
23. Serial Interface UARTi (i = 0 to 2, 5 to 7)
D3 D4 D5 D6
D3 D4 D5 D6
D4 D3 D2 D1
D4 D3 D2 D1
D7 P SP
D7 P SP
D0 P SP
D0 P SP
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