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ST72521 数据表(PDF) 135 Page - STMicroelectronics |
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ST72521 数据表(HTML) 135 Page - STMicroelectronics |
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135 / 211 page  ST72521 135/211 CONTROLLER AREA NETWORK (Cont’d) INTERRUPT CONTROL REGISTER (ICR) Read/Write Reset Value: 00h Bit 6 = ESCI Extended Status Change Interrupt − Read/Set/Clear Set by software to specify that SCIF is to be set on receive errors also. Cleared by software to set SCIF only on status changes and wake-up but not on all receive errors. Bit 5 = RXIE Receive Interrupt Enable − Read/Set/Clear Set by software to enable an interrupt request whenever a message has been received free of er- rors. Cleared by software to disable receive interrupt re- quests. Bit 4 = TXIE Transmit Interrupt Enable − Read/Set/Clear Set by software to enable an interrupt request whenever a message has been successfully trans- mitted. Cleared by software to disable transmit interrupt requests. Bit 3 = SCIE Status Change Interrupt Enable − Read/Set/Clear Set by software to enable an interrupt request whenever the node’s status changes in run mode or whenever a dominant pulse is received in standby mode. Cleared by software to disable status change inter- rupt requests. Bit 2 = ORIE Overrun Interrupt Enable − Read/Set/Clear Set by software to enable an interrupt request whenever a message should be stored and no re- ceive buffer is avalaible. Cleared by software to disable overrun interrupt re- quests. Bit 1 = TEIE Transmit Error Interrupt Enable − Read/Set/Clear Set by software to enable an interrupt whenever an error has been detected during transmission of a message. Cleared by software to disable transmit error inter- rupts. Bit 0 = ETX Early Transmit Interrupt − Read/Set/Clear Set by software to request the transmit interrupt to occur as soon as the arbitration phase has been passed successfully. Cleared by software to request the transmit inter- rupt to occur at the completion of the transfer. 70 0 ESCI RXIE TXIE SCIE ORIE TEIE ETX |
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