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EM346-RTR 数据表(PDF) 76 Page - Silicon Laboratories |
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EM346-RTR 数据表(HTML) 76 Page - Silicon Laboratories |
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76 / 142 page  EM346 Rev 1.0 77 8.3.5. Interrupts SPI slave controller second-level interrupts are generated on the following events: Transmit FIFO empty and last character shifted out (depending on SCx_INTMODE, either the 0 to 1 transition or the high level of SC_SPITXIDLE) Transmit FIFO changed from full to not full (depending on SCx_INTMODE, either the 0 to 1 transition or the high level of SC_SPITXFREE) Receive FIFO changed from empty to not empty (depending on SCx_INTMODE, either the 0 to 1 transition or the high level of SC_SPIRXVAL) Transmit DMA buffer A/B complete (1 to 0 transition of SC_TXACTA/B) Receive DMA buffer A/B complete (1 to 0 transition of SC_RXACTA/B) Received and lost character while receive FIFO was full (receive overrun error) Transmitted character while transmit FIFO was empty (transmit underrun error) To enable CPU interrupts, set desired interrupt bits in the second-level INT_SCxCFG register, and also enable the top-level SCx interrupt in the NVIC by writing the INT_SCx bit in the INT_CFGSET register. |
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