M30620ECFS datasheet(366/621 Pages) RENESAS

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UART

Mitsubishi microcomputers

M16C / 62 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

351

(e) Bus collision detection function

This function is to sample the output level of the TxD pin and the input level of the RxD pin at the

rising edge of the transfer clock; if their values are different, then an interrupt request occurs.

The following are examples in which functions (a) to (e) are chosen:

_______

• Transmission WITH: CTS function, WITHOUT: other functions ............................................... P358

_______

• Reception WITH: RTS function, WITHOUT: other functions .................................................... P362

Also, the SIM interface is used by adding some extra settings in UART2's clock-asynchronous serial

I/O mode. Direct or inverse format is selected by connecting SIM card.

• Transmission WITH: direct format ............................................................................................ P366

• Reception WITH: direct format ................................................................................................. P370

(6) Input to the serial I/O and the direction register

To input an external signal to the serial I/O, set the direction register of the relevant port to input.

(7) Pins related to the serial I/O

_________

_________ __________

• CTS0, CTS1, CTS2 pins

_______

:Input pins for the CTS function

_________

• RTS0, RTS1, RTS2 pins

_______

:Output pins for the RTS function

• CLK0, CLK1 pins

:Input pins for the transfer clock

• RxD0, RxD1, RxD2 pins

:Input pins for data

• TxD0, TxD1, TxD2 pins

:Output pins for data

Since TxD2 pin is N-channel open drain, this pin needs pull-up resistor.

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