參數(shù)資料
型號(hào)： MCM20027IBMN
廠商： MOTOROLA INC
元件分類： 圖像傳感器
英文描述： Color SXGA Digital Image Sensor 1280 x 1024 pixel progressive scan solid state image sensor with integrated CDS/PGA/ADC, digital programming, control
中文描述： IMAGE SENSOR-CMOS, 10fps, 0.20-2.80V, SQUARE, SURFACE MOUNT
封裝： CERAMIC, LCC-48
文件頁(yè)數(shù)： 13/74頁(yè)
文件大?。?/td> 973K
代理商： MCM20027IBMN
Revision 8.0 - 28 November 2001 : MCM20027
MOTOROLA
13
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
ImageMOS
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
Figure 11
for a pictorial description of the
Virtual Frame and its relationship to the WOI
.
Figure 11. Virtual Frame Definition
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
frame
= (vrd
d
+ 1) * T
row
where
vrd
d
defines the number of rows in the virtual
frame. The user controls vrd
d
via the Virtual Frame Row
Depth registers (
Table 42 on page 55
and
Table 43 on
page 55
).
Frame Rate
= (Frame time)
-1
6.2 Integration Time in CFRS mode:
In Continuous Frame Rolling Shutter capture mode, the
Integration time is defined as:
Integration Time=T
int
= (cint
d
+ 1) * T
row
where
cint
d
is the number of virtual row times desired
for integration time. Therefore, the integration time in
CFRS mode can be adjusted in steps of virtual frame
row times.The user controls
cint
d
via the
Integration
Time MSB Register, (Table 40), on page 54
and
Inte-
gration Time LSB Register, (Table 41), on page 55
.
Row Time
(T
row
)
is the length of time required to read
one row of the virtual frame and can be defined as:
T
row
= (vcw
d
+ shs
d
+ shr
d
+ 19) * MCLK
period
where
vcw
d
defines the number of columns in the virtu-
al frame and
shs
d
and
shr
d
are internal timing control
registers.
The user controls
vcw
d
via the CFRS Virtual Frame
Column Width registers (
Table 44 on page 56
and
Table
45 on page 56
).
The user controls the
shs
d
and
shr
d
values via the
In-
ternal Timing Control Register 1 (shs time definition);
Table 50
and
Table 51, “Internal Timing Control Regis-
ter 2 (shr time definition),” on page 60
.
NOTE!!
In Continuous Frame Rolling Shutter
(CFRS) capture mode, the Integration time upper
limit is bounded by the Frame time (see
“CFRS
Frame Time/Rate:” on page 13
)
.
i.e.. T
int
<
T
frame
0
vcw[13:0]
0
vrd[13:0]
WOI Pointer (wcp,wrp)
W
WOI Column Width (wcw)
Virtual Frame
Window of Interest (WOI)
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