© Quantum Research Group Ltd.
processing time. When this happens, burst timing and host
communications can slow down and become erratic.
5.7 Timing Limitations
The device requires processing time between bursts, as well
as time to handle communications with the host. With short
burst spacings, long burst lengths, and long intra-burst pulse
spacings, the device can simply run out of available
Burst spacings should be verified on an oscilloscope during
development to be certain that the device timings are
preserved and are constant. If not, the burst length and/or
pulse spacing should be reduced.
Table 5-2 Permissible Burst Lengths (BL’s)
Pulse Spacing = 2µs
Pulse Spacing = 3µs
Pulse Spacing = 4µs
Pulse Spacing = 5µs
Pulse Spacing = 6µs
Burst
Max BL
Spacing
Burst
Max BL
Spacing
Burst
Max BL
Spacing
Burst
Max BL
Spacing
Burst
Max BL
Spacing
250
300
25
50
64
64
64
64
250
300
10
20
40
64
64
64
250
300
10
20
40
64
64
64
250
300
10
20
40
50
64
64
250
300
7
15
30
50
64
64
400
400
400
400
400
500
500
500
500
500
1,000
2,000
1,000
2,000
1,000
2,000
1,000
2,000
1,000
2,000
Pulse Spacing = 7µs
Pulse Spacing = 8µs
Pulse Spacing = 9µs
Pulse Spacing = 10µs
Burst
Max BL
Spacing
Burst
Max BL
Spacing
Burst
Max BL
Spacing
Burst
Max BL
Spacing
250
300
7
250
300
7
250
300
7
250
300
5
15
30
40
50
64
12
25
30
50
64
12
20
30
40
64
10
20
30
40
64
400
400
400
400
500
500
500
500
1,000
2,000
1,000
2,000
1,000
2,000
1,000
2,000
lQ
34
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