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TRM-915-R250 データシート(PDF) 28 Page - Linx Technologies |
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TRM-915-R250 データシート(HTML) 28 Page - Linx Technologies |
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28 / 39 page  – – – – 50 51 CMD Halts Traffic- Address = 0x6E; NV Address = 0x23 When configuring the module’s register settings, it is possible that incoming RF transmissions can intermix with the module’s response, making it difficult to determine if your commands were successfully processed. Changing this register setting to 0x01 causes the module to store incoming RF traffic (up to the RF buffer overflow) while the CMD line is low. When the CMD line is returned high, the module outputs all buffered data. Figure 57 shows examples of the commands and Figure 58 shows the available values. Figure 57: 250 Series Transceiver CMD Halts Traffic Command and Response 250 Series CMD Halts Traffic Register Settings V1 Mode 0x00 Disable Halt 0x01 Enable Halt Figure 58: 250 Series CMD Halts Traffic Register Settings 250 Series CMD Halts Traffic Read Command Read Response Header Size Escape Address ACK Address Value 0xFF 0x02 0xFE 0x6E 0x23 0x06 0x6E 0x23 V1 Write Command Header Size Address Value 0xFF 0x02 0x6E 0x23 V1 Exception Mask - Address = 0x6C; NV Address = 0x21 The module has a built-in exception engine that can notify the host processor of an unexpected event. When an exception occurs, this register is ANDed with the exception code. A non-zero result causes the EX line to be asserted. Reading the regEXCEPTION register clears the exception and resets the EX line. If the result is zero, the EX line is not asserted but the exception code is stored in the regEXCEPTION register. Figure 55 shows examples of the commands and Figure 56 shows the available values. Figure 55: 250 Series Transceiver Exception Mask Command and Response 250 Series Example Exception Masks V1 Exception Name 0x08 Allows only EX_BUFOVFL and EX_RFOVFL to trigger the EX line 0x10 Allows only EX_WRITEREGFAILED to trigger the EX line 0x20 Allows only EX_NORFACK to trigger the EX line 0x40 Allows only EX_BADCRC, EX_BADHEADER, EX_BADSEQID and EX_ BADFRAMETYPE exceptions to trigger the EX line 0x60 Allows EX_BADCRC, EX_BADHEADER, EX_BADSEQID, EX_BADFRAMETYPE and EX_NORFACK exceptions to trigger the EX line 0xFF Allows all exceptions to trigger the EX line Figure 56: 250 Series Transceiver Example Exception Masks 250 Series Exception Masks Read Command Read Response Header Size Escape Address ACK Address Value 0xFF 0x02 0xFE 0x6C 0x21 0x06 0x6C 0x21 V1 Write Command Header Size Address Value 0xFF 0x02 0x6C 0x21 V1 |
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