MCM20027 Motorola, MCM20027 Datasheet - Page 14

• Manufacturer Part Number: MCM20027
• Description: Color SXGA Digital Image Sensor 1280 x 1024 pixel progressive scan solid state image sensor with integrated CDS/PGA/ADC / digital programming / control
• Manufacturer: Motorola

6.3 SFRS Frame Time/Rate:
In Single Frame Rolling Shutter capture mode the Frame
time is defined as:
Frame time = T
Readout time is the amount of time to readout the data af-
ter integration of the row has been completed. It is defined
as follows:
Readout time = (vrd
where vrd
frame. The user controls vrd
Row Depth registers
on page
T
For Integration time see
mode” on page 14
6.3.1 Integration Time in SFRS mode
The Integration time in Single Frame Rolling Shutter cap-
ture mode is the same as in Rolling Shutter Capture
Mode. For further information, see
CFRS mode:” on page
in this mode the Integration time is NOT bounded by
the Frame time
6.4 Example of Frame time/rate and Integration Time
The following illustrates how to determine the Frame time/
rate and Integration time in both capture modes:
Assumptions:
1) Active Window of Interest = 1280 x 1024
2) Virtual Column Width
3) Virtual Row Depth (vrd
4) Sample & hold time (shs
5) Sample & hold time (shr
6) Integration Time
7) MCLK = 13.5 Mhz
MOTOROLA
row
in CFRS and SFRS modes
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
= (vcw
55).
d
defines the number of rows in the virtual
d
i.e.. (wcw
+ shs
(wrd
frame
(cint
d
d
= Integration time+Readout time
(Table 42 on page 55
d
+ shr
)=1023
d
+ 1) * T
)=1279
d
13. The only difference is that
(vcw
)= 350
d
“Integration Time in SFRS
d
) = 1034
d
d
d
) = 10
+ 19) * MCLK
) = 10
via the CFRS Virtual Frame
d
row
)= 1290
“Integration Time in
period
and
Table 43
NOTE!!
frame
Calculations:
Row Time =Trow = (vcwd + shsd + shrd + 19)
Integration Time = (cintd + 1) * Trow
Readout time = (vrdd + 1) * Trow
Frame Time in CFRS mode = (vrd
Frame Time in SFRS mode =
Results
NOTE!! CFRS Integration time = 34.5ms because:
(see
Capture Mode
“Integration Time in CFRS mode:” on page
CFRS
SFRS
vcw
T
frame
= Frame time in CFRS mode
d
T
and
int
=(350+1)*98.44 s
=34.5ms
= (1290 + 10 + 10 + 19) / 13.5e6
= 98.44 s
= 34.5ms + 101.34ms
= 135.84ms
= Integration time+Readout time
< T
T
cint
frame
frame
Revision 8.0 - 28 November 2001 :
d
are typically varied frame to
= 101.34 ms
=(1034 + 1)* 98.44
= (vrd
34.5ms
34.5ms
T
int
d
d
+ 1) * T
ImageMOS
ImageMOS
+ 1) * Trow
101.34 ms
135.84ms
row
T
frame
13)
MCM20027
14