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9202 数据表(PDF) 41 Page - STMicroelectronics |
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9202 数据表(HTML) 41 Page - STMicroelectronics |
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41 / 175 page  41/175 UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV USART Interrupt s The USART Interrupt is generated by RI (receive interrupt) OR TI (transmit interrupt). s When the USART Interrupt is generated, the corresponding request flag must be cleared by software. The interrupt service routine will have to check the various USART registers to determine the source and clear the corresponding flag. s Both USART’s are identical, except for the additional interrupt controls in the Bit 4 of the additional interrupt control registers (A7H, B7H) Figure 16. Interrupt System AI06646 INT0 USART Timer 0 I2C INT1 DDC Timer 1 USB 2nd USART Timer 2 High Low Interrupt Sources IE / IP / IPA Priority Global Enable |
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