7721 datasheet(228/577 Pages) RENESAS

Numer części	7721

Szczegółowy opis	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	577 Pages

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Producent	RENESAS [Renesas Technology Corp]

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SERIAL I/O

7721 Group User’s Manual

11–25

11.3 Clock synchronous serial I/O mode

Fig. 11.3.8 Initial setting example for relevant registers when receiving (2)

Port P8 direction register (Address 1416)

RXD0 pin

RXD1 pin

From preceding Figure 11.3.7

UART0 receive interrupt control register (Address 7216)

UART1 receive interrupt control register (Address 7416)

Interrupt priority level select bits

When using interrupts, set these bits to one of levels 1 to 7.

When disabling interrupts, set these bits to level 0.

UART0 transmit buffer register (Address 3216)

UART1 transmit buffer register (Address 3A16)

Set dummy data here.

UART0 transmit/receive control register 1 (Address 3516)

UART1 transmit/receive control register 1 (Address 3D16)

Transmit enable bit

1 : Transmission enabled

Receive enable bit

1 : Reception enabled

Reception starts.

Note: Set the receive enable bit and the transmit enable bit

to “1” simultaneously.

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