7721 datasheet(248/577 Pages) RENESAS

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7721 Arkusz danych(PDF) 248 Page - Renesas Technology Corp

Numer części	7721

Szczegółowy opis	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	577 Pages

Scroll/Zoom	100%

Producent	RENESAS [Renesas Technology Corp]

Strona internetowa	http://www.renesas.com

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248 / 577 page

7721 Group User’s Manual

11–45

SERIAL I/O

11.4 Clock asynchronous serial I/O (UART) mode

Fig. 11.4.12 Example of receive timing when transfer data length = 8 bits (when parity disabled,

____

selecting 1 stop bit, selecting RTS function)

RxDi

RTSi

The above timing diagram applies when the

following conditions are satisfied:

q Parity disabled

q 1 stop bit

q RTS function selected

BRGi count

source

Receive enable bit

Transfer clock

Receive

complete flag

UARTi receive interrupt

request bit

Start bit

Sampled “L”

Received data taken in

Stop bit

At falling edge of start bit, transfer clock

is generated and reception started.

UARTi receive register

UARTi receive buffer register

Cleared to “0” when interrupt request is accepted

or cleared by software.

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