M16C29 Datasheet, PDF (219/499 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/Tiny SERIES

M16C/29 Group
14. Serial I/O
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14.1.2.6 CTS/RTS Separate Function (UART0)
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This function separates CTS0/RTS0, outputs RTS0 from the P60 pin, and accepts as input the CTS0
from the P64 pin or P70 pin. To use this function, set the register bits as shown below.
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• The CRD bit in the U0C0 register is set to 0 (enables UART0 CTS/RTS)
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• The CRS bit in the U0C0 register is set to 1 (outputs UART0 RTS)
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• The CRD bit in the U1C0 register is set to 0 (enables UART1 CTS/RTS)
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• The CRS bit in the U1C0 register is set to 0 (inputs UART1 CTS)
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• The RCSP bit in the UCON register is set to 1 (inputs CTS0 from the P64 pin or P70 pin)
• The CLKMD1 bit in the UCON register is set to 0 (CLKS1 not used)
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Note that when using the CTS/RTS separate function, UART1 CTS/RTS separate function cannot be
used.
MCU
TXD0 (P63)
RXD0 (P62)
IC
IN
OUT
RTS0 (P60)
CTS0 (P64)
CTS
RTS
NOTE:
1. This applies to the case where the U1MAP bit in the PACR register is set to 0 (P67 to P64).
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Figure 14.21 CTS/RTS Separate Function
Rev. 1.12 Mar.30, 2007 ^{page 195} of 458
REJ09B0101-0112