FT18 Philips Semiconductors, FT18 Datasheet - Page 6

• Manufacturer Part Number: FT18
• Description: Frame Transfer CCD Image Sensor
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Timing diagrams (for default operation)
2000 January
Horizontal frequency (1/Tp)
Vertical frequency
Frame Transfer CCD Image Sensor
SSC
Line Timing
Pixel Timing
RG
C1
C2
C3
H
L
H
L
H
L
H
L
H
L
Tp/6 = (1/36MHz)/6 = 4.63ns
In this figure, charge is transported to the left output buffer (normal readout) by moving it from C1 to C2 to C3 etc.
By exchanging the timing of C1 and C2, charge will be transported to the right output buffer (mirrored readout).
Phase
or
pixel count
AC Characteristics
SSC
BLC
CB
CR
PB
A1
A2
A3
A4
B2
B3
B4
B1
One cycle of the storage gates (during line blanking), moving one line from storage to output register
One charge pumping cycle of the image gates (during line blanking), shifting the charge of one line back and forth
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
Start-Stop C-clocks
Pre-Blanking
Black Level Clamp
Composite Blanking
Charge Reset
1100 1110 1120 1130 1140
1/(36MHz) = 27.8ns
Figure 3 - Line and pixel timing diagrams
Tp = 1/36MHz = 27.8ns
1131
1150
0
0
0
0
C clocks stopped for 2 microseconds
10
6
19
19
20
20
26
1.25 microseconds
28
30
32
Min.
-
-
37
38
40
44
46
50
50
55
56
60
62
64
64
70
Typical
36
750
72
79
79
80
1080 pixels until 1152
90
100
99
Max.
40
833
110
120
Product specification
Unit
MHz
kHz
FT 18