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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M16C/1N датащи(PDF) 164 Page - Renesas Technology Corp |
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M16C/1N датащи(HTML) 164 Page - Renesas Technology Corp |
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164 / 238 page  Rev.1.00 Oct 20, 2004 page 152 of 222 M16C/1N Group 16. CAN Module REJ09B0007-0100Z 16.12.1 Reception Figure 16.24 shows the behavior of the module when receiving two consecutive CAN messages. Figure 16.24 Timing of Receive Data Frame Sequence (1) On monitoring a SOF on the bus the RecState bit becomes active immediately, given the module has no transmission pending (see section "16.12.2 Transmission" below). (2) After successful reception of the message the NewData bit of the receiving slot becomes active. The InvalData bit becomes active at the same time and becomes inactive again after the complete message was transferred to the slot. (3) When the bit in the C0ICR register of the receiving slot is active the receive successful interrupt is requested and the C0STR register changes. It shows the slot number where the message was stored and the RecSucc bit is active. (4) Read the message out of the slot after setting the New Data bit to “0” by a program. (5) If the NewData bit is set to "0" by a program or the next CAN message is received successfully before the reception request for the slot is canceled, the MsgLost bit is set to "1". The new received message is transferred to the slot. The interrupt request and the C0STR register change like (3). CANbus RecReq InvalData Succ.Rec Int. RecState RecSucc MBOX NewData SOF ACK ACK EOF EOF IFS IFS SOF Receive slot No. MsgLost (1) (2) (2) (3) (4) (5) (5) (5) |
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