M38045F2HKP datasheet(207/387 Pages) RENESAS

Nome de Peças	M38045F2HKP

Descrição Electrónicos	8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES

PDF	387 Pages

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

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2-83

APPLICATION

2.4 Serial interface

Rev.1.00 Jan 14, 2005

REJ09B0212-0100Z

3804 Group (Spec.H)

(7)

Transmit interrupt request when transmit enable bit is set

When the transmit interrupt is used, take the following sequence.

➀ Set the serial I/Oi transmit interrupt enable bit (i = 1, 3) to “0” (disabled).

➁ Set the tranasmit enable bit to “1”.

➂ Set the serial I/Oi transmit interrupt request bit (i = 1, 3) to “0” after 1 or more instruction has

executed.

➃ Set the serial I/Oi transmit interrupt enable bit (i = 1, 3) to “1” (enabled).

q Reason

When the transmission enable bit is set to “1”, the transmit buffer empty flag and transmit shift

Therefore, regardless of selecting which timing for the generating of transmit interrupts, the interrupt

request is generated and the transmit interrupt request bit is set at this point.

(8)

Writing to baud rate generator i (BRGi) (i = 1, 3)

Write data to the baud rate generator i (BRGi) (i = 1, 3) while the transmission/reception operation

is stopped.

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