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ST7LITE3XF2 bảng dữ liệu(PDF) 170 Page - STMicroelectronics

tên linh kiện ST7LITE3XF2
Giải thích chi tiết về linh kiện  8-bit MCU with single voltage Flash, data EEPROM, ADC, timers, SPI, LINSCI?
PDF  173 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITE3XF2 bảng dữ liệu(HTML) 170 Page - STMicroelectronics

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IMPORTANT NOTES (Cont’d)
Impact on application
Software may execute the interrupt routine twice
after header reception.
Moreover, in reception mode, as the receiver is no
longer in mute mode, an interrupt will be generat-
ed on each data byte reception.
Workaround
The problem can be detected in the LINSCI inter-
rupt routine. In case of timeout error (LHE is set
and LHLR is loaded with 00h), the software can
check the RWU bit in the SCICR2 register. If RWU
is cleared, it can be set by software. Refer to Fig-
ure 110. Workaround is shown in bold characters.
Figure 110. LINSCI Interrupt routine
@interrupt void LINSCI_IT ( void ) /* LINSCI interrupt routine */
{
/* clear flags */
SCISR_buffer = SCISR;
SCIDR_buffer = SCIDR;
if ( SCISR_buffer & LHE )/* header error ? */
{
if (!LHLR)/* header time-out? */
{
if ( !(SCICR2 & RWU) )/* active mode ? */
{
_asm("sim");/* disable interrupts */
SCISR;
SCIDR;/* Clear RDRF flag */
SCICR2 |= RWU;/* set mute mode */
SCISR;
SCIDR;/* Clear RDRF flag */
SCICR2 |= RWU;/* set mute mode */
_asm("rim");/* enable interrupts */
}
}
}
}
Example using Cosmic compiler syntax



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