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TSS463B датащи(PDF) 32 Page - ATMEL Corporation |
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TSS463B датащи(HTML) 32 Page - ATMEL Corporation |
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32 / 59 page ![]() 32 TSS463B 4102E–AUTO–12/04 Transmission Status Register (0x05) • Read only register. • Default value after reset: 0x00. • The transmission Status register contains the number of retries made up-to-date, according to the Table 5., and the channel currently in transmission. NRT [3:0] Number of retries done in transmission. IDT [3:0] Channel number currently in transmission. Last Message Status Register (0x06) • Read only register. • Default value after reset: 0x00. • This register is basically the same as the transmission status register. It contains the last identifier number that was successfully transmitted, received or exceeded its retry count. If it was a successful transmission, the number of retries performed can be seen in this register as well. NRTR [3:0] Number of retries done successfully in transmission. In case of reception NRTR[3:0] is undefined. IDTR [3:0] Channel number that was successfully transmitted, received or exceeded its retry count. Last Error Status Register (0x07) • Read only register. • Default value after reset: 0 ×00. • The Last Error Status Register contains the error code for the last transmission or reception attempt. It is updated after each attempt, i.e. several error codes can be reported during one single transmission (with several retries). BOC: Buffer occupied • when one channel configured in “Reply request” mode has its “received” bit set when it attempts to transmit its request. • BOC with the link capability between two channels sharing the same received buffer, is set when one channel has already set its “received” bit in its “Message length and status Channel register” and a receive is attempt on the other one. One: BOC active Zero: BOC inactive 7654 3210 NRT3 NRT2 NRT1 NRT0 IDT3 IDT2 IDT1 IDT0 7654 3210 NRTR3 NRTR2 NRTR1 NRTR0 IDTR3 IDTR2 IDTR1 IDTR0 7654 3210 X BOC BOV X FCSE ACKE CV FV |
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