Aim MIL-STD-1553 - REMOTE TERMINAL FUNCTIONS

MIL-STD-1553 Reference Manual
253
Chapter 7 – Bus Controller Functions
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‘type’
Value
Description
Gap Error
1..15
Low Speed Gap Error Half Bits
Zero Crossing Error
0
1
2
3
125ns deviation
187.5ns deviation
156.25ns deviation
218.75ns deviation
Note: Values 2 and 3 are not available for all
AIM devices. Please check the chapter
“Board functionality overview” and look
for “Error Injection of High Resolution
Zero Crossing Deviation”.
Note: The resolution is:
1Mbit: 0.5µs per Half Bit
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1
1
Reserved (0)
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Bit 31
Bit 30
Bit 29
Bit 28
Bit 27
Bit 26
Bit 25
Bit 24
0 (Reserved)
Bit 23
Bit 22
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
WPOS
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
BPOS
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
BCBITS
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Value
Description
0..32
Error Word Position (0 = Command Word)
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Value
Description
4..20
Error Bit Position (20 =Parity Bit)
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Value
Description
1..3
Amount of Bit Count Error Bits
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1
1
6
6
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‘gap_mode’
Value
Description
0 or 1
0..16383
Transfer Wait Time in µs
2
0..63
Transfer Wait Time
It is calculated as follows:
Time = 4µs + (Value * 0.25µs)
See the description of ‘gap_mode’ for more detailed information.
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26-bit Transfer Descriptor Address (Byte-Address relative to the start of the Global
RAM)