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MDEV-868-PRC Datasheet(PDF) 25 Page - Linx Technologies |
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MDEV-868-PRC Datasheet(HTML) 25 Page - Linx Technologies |
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25 / 55 page ![]() – – – – 44 45 CRCERRS - CRC Error Count Volatile Address = 0x40 The value in the CRCERRS register is incremented each time a packet with a valid header is received that fails the CRC check on the payload. This check applies only to unencrypted packets. Overflows are ignored. Writing 0x00 to this register initializes the count. Figure 31 shows the command and response. HOPTABLE - Channel Hop Table Volatile Address = 0x4B; Non-Volatile Address = 0x00 The module supports 6 different hop sequences with minimal correlation. The sequence is set by the value in the HOPTABLE register. Changing the hop sequence changes the band utilization, much the same way that a channel does for a non-hopping transmitter. The hop table selection must match between the transmitter and receiver. Valid values are 0-5. The default value of 0xFF must be changed before communication can occur. This is normally done by the Join process. Figure 32 shows the command and response. Figure 31: HumPRCTM Series CRC Error Count Command and Response Figure 32: HumPRCTM Series Channel Hop Table Command and Response HumPRCTM Series CRC Error Count Read Command Read Response Header Size Escape Address ACK Address Value 0xFF 0x02 0xFE 0x40 0x06 0x40 V Write Command Header Size Address Value 0xFF 0x02 0x40 V HumPRCTM Series Channel Hop Table Read Command Read Response Header Size Escape Address ACK Address Value 0xFF 0x02 0xFE 0x4B 0x00 0x06 0x4B 0x00 V Write Command Header Size Address Value 0xFF 0x02 0x4B 0x00 V HumPRCTM Series RF Channels Channel Number Frequency (MHz) Channel Number Frequency (MHz) 0 863.05 35 866.55 1 863.15 36 866.65 2 863.25 37 866.75 3 863.35 38 866.85 4 863.45 39 866.95 5 863.55 40 867.05 6 863.65 41 867.15 7 863.75 42 867.25 8 863.85 43 867.35 9 863.95 44 867.45 10 864.05 45 867.55 11 864.15 46 867.65 12 864.25 47 867.75 13 864.35 48 867.85 14 864.45 49 867.95 15 864.55 50 868.05 16 864.65 51 868.15 17 864.75 52 868.25 18 864.85 53 868.35 19 864.95 54 868.45 20 865.05 55 868.55 21 865.15 56 868.65 22 865.25 57 868.75 23 865.35 58 868.85 24 865.45 59 868.95 25 865.55 60 869.05 26 865.65 61 869.15 27 865.75 62 869.25 28 865.85 63 869.35 29 865.95 64 869.45 30 866.05 65 869.55 31 866.15 66 869.65 32 866.25 67 869.75 33 866.35 68 869.85 34 866.45 69 869.95 Figure 33: HumPRCTM Series RF Channels Figure 33 shows the RF channels used by the HumPRCTM Series. Figure 34 shows the hop sequences referenced by channel number. The default hop sequence is 0. |
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