MCM20027 Motorola, MCM20027 Datasheet - Page 13

• 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

Revision 8.0 - 28 November 2001 :
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
6.0 Frame Rate and Integration Time Control
In addition to the minimum time required to readout the
selected resolution and WOI, the user has the ability to
control the frame rates while operating in either Contin-
uous Frame Rolling Shutter capture mode (CFRS) and
Single Frame Rolling Shutter (SFRS).
The frame rate can be defined as the time required to
readout an entire frame of data plus the required bound-
ary timing. This is done by varying the size of a number
of parameters identified in later sections, the main one
being the Virtual Frame surrounding the WOI.
Please refer to
Virtual Frame and its relationship to the WOI
.
6.1 CFRS Frame Time/Rate:
In Continuous Frame Rolling Shutter capture mode, the
Frame time is completely defined by the size of the Vir-
tual Frame and can be expressed as:
Frame Time = T
where vrd
frame. The user controls vrd
Depth registers
page
Frame Rate = (Frame time)
vrd[13:0]
0
55).
0
Figure 11. Virtual Frame Definition
d
Window of Interest (WOI)
defines the number of rows in the virtual
Figure 11
WOI Column Width (wcw)
(Table 42 on page 55
frame
WOI Pointer (wcp,wrp)
= (vrd
Virtual Frame
for a pictorial description of the
MCM20027
d
-1
d
via the Virtual Frame Row
+ 1) * T
row
and
Table 43 on
vcw[13:0]
6.2 Integration Time in CFRS mode:
In Continuous Frame Rolling Shutter capture mode, the
Integration time is defined as:
Integration Time=T
where cint
for integration time. Therefore, the integration time in
CFRS mode can be adjusted in steps of virtual frame
row times.The user controls cint
Time MSB Register, (Table 40), on page 54
gration Time LSB Register, (Table 41), on page
Row Time (T
one row of the virtual frame and can be defined as:
T
where vcw
al frame and shs
registers.
The user controls vcw
Column Width registers
45 on page
The user controls the shs
ternal Timing Control Register 1 (shs time definition);
Table 50
ter 2 (shr time definition),” on page
NOTE!!
(CFRS) capture mode, the Integration time upper
limit is bounded by the Frame time (see
Frame Time/Rate:” on page
row
= (vcw
In Continuous Frame Rolling Shutter
and
d
d
56).
d
is the number of virtual row times desired
defines the number of columns in the virtu-
row
+ shs
Table 51, “Internal Timing Control Regis-
) is the length of time required to read
d
and shr
i.e.. T
d
int
+ shr
d
= (cint
(Table 44 on page 56
via the CFRS Virtual Frame
int
d
d
d
and shr
< T
+ 19) * MCLK
are internal timing control
d
13).
ImageMOS
ImageMOS
frame
+ 1) * T
d
via the
60.
d
values via the
row
Integration
period
“CFRS
and
and
MOTOROLA
55.
Inte-
Table
In-
13