NED
UME-0041-01 XCM20125GIG
39
P
S
Exposure
Figure
4-6-1 Free Run Exposure Mode
To calculate the exposure time/scan period from the register value in free run
mode:
Step 1)
P = Counter ÷ { Clock ÷ 2 ÷ Dividing }
Step 2)
S = P + [{P 6} ÷ { Clock ÷ 2 ÷ Dividing }]
P
Programmable Exposure Time Setting
(μs)
S
Scan Rate
(μs)
Clock
62.5(MHz fixed)
Padding
20 (fixed)
Dividing
2 / 4
Counter
134
~
32767
(Example) Clock = 62.5
,
Dividing = 2
,
Counter = 1000
Programmable Exposure Time
(μs) = 1000 ÷ {62.5 ÷ 2 ÷ 2} = 64
Scan Rate
(μs) = 100 + [{20 + 6} ÷ {62.5 ÷ 2 ÷ 2}] = 65.7
Notes:
When a region wider than the central 1024 pixels is specified, the register value can
be set from 134-267; however, internally the minimum value is fixed at 268.
Содержание XCM20125GIG
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