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M38040F2HKP Datasheet(PDF) 207 Page - Renesas Technology Corp

Part # M38040F2HKP
Description  8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  387 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M38040F2HKP Datasheet(HTML) 207 Page - 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
register shift completion flag are also set to “1”.
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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