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AS7265X датащи(PDF) 27 Page - ams AG

номер детали AS7265X
подробное описание детали  Smart 18-Channel VIS to NIR Spectral_ID 3-Sensor Chipset with Electronic Shutter
PDF  63 Pages
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производитель  AMSCO [ams AG]
домашняя страница  http://www.ams.com
Logo AMSCO - ams AG

AS7265X датащи(HTML) 27 Page - ams AG

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Page 27
[v1-04] 2018-Jul-09
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AS7265x − Detailed Description
4-Byte Floating-Point (FP) Registers
Several 4 byte registers (hex) are used by the AS72651. Here is
an example of how these registers are used to represent floating
point data (based on the IEEE 754 standard).
Figure 25:
Example of the IEEE 754 Standard
The floating point (FP) value assumed by 32 bit binary32 data
with a biased exponent e (the 8 bit unsigned integer) and a 23
bit fraction is (for the above example):
0 0 1 1 1 1 1 0
31
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3E (hex)
20 (hex)
00 (hex)
00 (hex)
byte 3
byte 2
byte 1
byte 0
0 0 1 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
exponent (8 bits)
fraction (23 bits)
24 23
16 15
8 7
0
31
23
30
22
0
sign
= 0.15625
(EQ1)
FPvalue
1
–
()
sign
1b23 i
–
i1
–
23
2
i
–
⋅
+




2
e 127
–
()
⋅⋅
=
FPvalue
1
–
()
0
1b23 i
–
i1
–
23
2
i
–
⋅
+




2
124 127
–
()
⋅⋅
=
FPvalue
1
1 2
2
–
+
() 2
3
–
0.15625
=
⋅⋅
=



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