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BEU8638-12 Datasheet(PDF) 5 Page - Aeroflex Circuit Technology |
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BEU8638-12 Datasheet(HTML) 5 Page - Aeroflex Circuit Technology |
5 / 10 page SCD8638 Rev D 3/21/08 Aeroflex Plainview 5 32-Word Telemetry To reduce data bus bandwidth usage, the 8638-12 supports a 32-word telemetry request on sub-address 20 as defined in Table III. First a 1553B receive command with one data word of AAAA(Hex) must be issued. After a minimum delay of 1.2ms, the data can be retrieved by sending a 1553B transmit command for 32 data words on sub-address 20. Reply word 31 is a modulo-16 message count. This counter increments by one for each valid telemetry request. The 12-bit analog data reply is left justified in the 16-bit 1553B data word with the four LSBs set to "0".. 8-Word Telemetry To reduce data bus bandwidth usage, the 8638-12 supports an 8-word telemetry request on sub-address 24 as defined in Table IV. First a 1553B receive command with one data word of 5555(Hex) must be issued. After a minimum delay of 1.2ms, the data can be retrieved by sending a 1553B transmit command for 8 data words on sub-address 24. Reply word 8 is a modulo-16 message count. This counter increments by one for each valid telemetry request. The 12-bit analog data reply is left justified in the 16-bit 1553B data word with the four LSBs set to "0". Table III – 32-Word Telemetry Item Telemetry Title Telemetry Type Reply Word Reply Bits 1 4V Reference Analog 1 D(15:4) 2 Total Battery Voltage 1 Analog 2 D(15:4) 3 Total Battery Voltage 2 Analog 3 D(15:4) 4 Total Battery Voltage 3 Analog 4 D(15:4) 5 Share Bus Voltage Analog 5 D(15:4) 6 Master Bypass Power Status Analog 6 D(15:4) 7 Cell 1 Voltage Analog 7 D(15:4) 8 Cell 2 Voltage Analog 8 D(15:4) 9 Cell 3 Voltage Analog 9 D(15:4) 10 Cell 4 Voltage Analog 10 D(15:4) 11 Cell 5 Voltage Analog 11 D(15:4) 12 Cell 6 Voltage Analog 12 D(15:4) 13 Cell 7 Voltage Analog 13 D(15:4) 14 Cell 8 Voltage Analog 14 D(15:4) 15 Cell 9 Voltage Analog 15 D(15:4) 16 Cell 10 Voltage Analog 16 D(15:4) 17 Cell 11 Voltage Analog 17 D(15:4) 18 Cell 12 Voltage Analog 18 D(15:4) 19 Cell 13 Voltage Analog 19 D(15:4) 20 Cell 14 Voltage Analog 20 D(15:4) 21 Cell 15 Voltage Analog 21 D(15:4) 22 Cell 16 Voltage Analog 22 D(15:4) 23 Cell 17 Voltage Analog 23 D(15:4) 24 Cell 18 Voltage Analog 24 D(15:4) 25 Cell 19 Voltage Analog 25 D(15:4) 26 Cell 20 Voltage Analog 26 D(15:4) 27 Cell 21 Voltage Analog 27 D(15:4) 28 Cell 22 Voltage Analog 28 D(15:4) 29 Cell 23 Voltage Analog 29 D(15:4) 30 Cell 24 Voltage Analog 30 D(15:4) 31 Message Count Analog 31 D(15:0) 32 Overvoltage Latch Status Bi-level 32 D13 1/ For Battery A. 2/ For Battery B. ⎭ ⎫ ⎬1/ ⎭ ⎫ ⎬2/ Table IV – 8-Word Telemetry Item Telemetry Title Telemetry Type Reply Word Reply Bits 1 Overvoltage Latch Status Bi-level 1 D13 2 Bypass Dev. 1 Arm Status Bi-level 2 D15 3 Bypass Dev. 2 Arm Status Bi-level 2 D14 4 Bypass Dev. 3 Arm Status Bi-level 2 D13 5 Bypass Dev. 4 Arm Status Bi-level 2 D12 6 Bypass Dev. 5 Arm Status Bi-level 2 D11 7 Bypass Dev. 6 Arm Status Bi-level 2 D10 8 Bypass Dev. 7 Arm Status Bi-level 2 D9 9 Bypass Dev. 8 Arm Status Bi-level 2 D8 10 Bypass Dev. 9 Arm Status Bi-level 3 D15 11 Bypass Dev. 10 Arm Status Bi-level 3 D14 12 Bypass Dev. 11 Arm Status Bi-level 3 D13 13 Bypass Dev. 12 Arm Status Bi-level 3 D12 14 Bypass Dev. 13 Arm Status Bi-level 3 D11 15 Bypass Dev. 14 Arm Status Bi-level 3 D10 16 Bypass Dev. 15 Arm Status Bi-level 3 D9 17 Bypass Dev. 16 Arm Status Bi-level 3 D8 18 Bypass Dev. 17 Arm Status Bi-level 4 D15 19 Bypass Dev. 18 Arm Status Bi-level 4 D14 20 Bypass Dev. 19 Arm Status Bi-level 4 D13 21 Bypass Dev. 20 Arm Status Bi-level 4 D12 22 Bypass Dev. 21 Arm Status Bi-level 4 D11 23 Bypass Dev. 22 Arm Status Bi-level 4 D10 24 Bypass Dev. 23 Arm Status Bi-level 4 D9 25 Bypass Dev. 24 Arm Status Bi-level 4 D8 26 0V Reference Analog 5 D(15:4) 27 Lowest Cell Voltage Analog 6 D(15:4) 28 Highest Cell Voltage Analog 7 D(15:4) 29 Message Count Analog 8 D(15:0) 1/ For Battery A. 2/ For Battery B. ⎭ ⎫ ⎬1/ ⎭ ⎫ ⎬2/ |
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