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STR720 датащи(PDF) 223 Page - STMicroelectronics |
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STR720 датащи(HTML) 223 Page - STMicroelectronics |
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223 / 401 page ![]() STR720 - CONTROLLER AREA NETWORK (CAN) 223/401 Bits 6:0 Direction = Read Bit 6 = Mask: Access Mask Bits 0: Mask bits unchanged. 1: Transfer Identifier Mask + MDir + MXtd to IFn Message Buffer Register. Bit 5 = Arb: Access Arbitration Bits 0: Arbitration bits unchanged. 1: Transfer Identifier + Dir + Xtd + MsgVal to IFn Message Buffer Register. Bit 4 = Control: Access Control Bits 0: Control Bits unchanged. 1: Transfer Control Bits to IFn Message Buffer Register. Bit 3 = ClrIntPnd: Clear Interrupt Pending Bit 0: IntPnd bit remains unchanged. 1: Clear IntPnd bit in the Message Object. Bit 2 = TxRqst/NewDat: Access Transmission Request Bit 0: NewDat bit remains unchanged. 1: Clear NewDat bit in the Message Object. Note A read access to a Message Object can be combined with the reset of the control bits IntPnd and NewDat. The values of these bits transferred to the IFn Message Control Register always reflect the status before resetting these bits. Bit 1 = Data A Access Data Bytes 3:0 0: Data Bytes 3:0 unchanged. 1: Transfer Data Bytes 3:0 to IFn Message Buffer Register. Bit 0 = Data B Access Data Bytes 7:4 0: Data Bytes 7:4 unchanged. 1: Transfer Data Bytes 7:4 to IFn Message Buffer Register. 1 |
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