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PAS5101PE Schematic ( PDF Datasheet ) - Pixart Imaging

Teilenummer PAS5101PE
Beschreibung CMOS 1.3MEGA DIGITAL IMAGE SESNSOR
Hersteller Pixart Imaging
Logo Pixart Imaging Logo 




Gesamt 20 Seiten
PAS5101PE Datasheet, Funktion
PAS5101PE Specification
PAS5101PE CMOS 1.3MEGA DIGITAL IMAGE SESNSOR
General Description
The PAS5101PE is a highly integrated CMOS active-pixel image sensor that has resolution of 1280( H ) x
1024 ( V ). To have an excellent image quality, the PAS5101PE output 10-bits RGB raw data though a parallel
data bus. It is available in 48-pin LCC.
The PAS5101PE can be programmed to set the exposure time for different luminance condition via I2CTM
serial control bus. By programming the internal register sets, it performs on-chip frame rate adjustment, offset
correction DAC, programmable gain control, 10-bits ADC, 10-bits output companding, interpolated sub-
sampling and defect compensation.
www.DataSheet4U.com
Features
Key Specification
z 1.3Mega resolution, ~1/3” Lens.
Supply Voltage
2.5v ~ 3.3v
z Bayer RGB color filter array.
z 10-bits parallel RGB raw data output.
z On-Chip 10-bits pipeline A/D converter.
z On-Chip programmable gain amplifier
Resolution
Array Diagonal
Pixel Size
1280 ( H ) x 1024 ( V )
5.9mm ( ~1/3” Optic )
3.6μm x 3.6μm
„ 4-bits color gain amplifier.
Max. Frame Rate
~15 fps @ 1.3Mega
„ 4-bits global gain amplifier.
z Digital gain stage.
z Continuous variable frame time.
z Continuous variable exposure time.
Max. System Clock
Max. Pixel Clock
Color Filter
Up to 48MHz
Up to 24MHz
RGB Bayer Pattern
z I2CTM interface.
Exposure Time
~ Frame time to Line time
z 20mA power dissipation ( 15fps / 2.5v ).
z < 10uA low power-down dissipation.
z Window-of-Interest (WOI).
z Sub-sampling.
Scan Mode
Sensitivity
S/N Ratio
Progressive
TBD
TBD
z Defect compensation.
Chief Ray Angle
20° ~ 2
z Lens shading compensation.
Package Type
48-pin LCC
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
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PAS5101PE Datasheet, Funktion
PAS5101PE Specification
3. Block Diagram & Function Description
3.1. Block Diagram
www.DataSheet4U.com
Figure 3.1 Shows the PAS5101PE sensor block diagram
The PAS5101PE is a 1/3” CMOS imaging sensor with 1280 ( H ) x 1024 ( V ) physical pixels. The active
region of sensor array is 1288 ( H ) x 1032 ( V ) as shown in Figure 3.1. The sensor array is cover with
Bayer pattern color filters and μ-lens. The first pixel location ( 0,0 ) is programmable in 2 direction ( X
and Y ) and the default value is at the left-down side of sensor array.
After a programmable exposure time, the image is sampled first with CDS ( Correlated Double Sampling )
block to improve S/N ration and reduce fixed pattern noise.
Three analog gain stages are implemented before signal transferred by the 10-bits A/D converter. The
front gain stage ( FG ) can be programmed to fit the saturation level of sensor to the full-range input of
ADC. The programmable color gain stage ( CG ) is used to balance the luminance response difference
between B/G/R. The global gain stage ( GG ) is programmed to adapt the gain to the image luminance.
The fine gained signal will be digitized by the on-chip 10-bits A/D converter. After the image data has
been digitized, further alteration to the signal can be applied before the data is output.
3.2. Defect Compensation
The defect compensation block can detect the possible defect pixel and replace it with average output of
like-colored pixels on either side of defective pixel. There is no limitation in the capability of defect
number. This function is also Enable / Disable by user.
3.3. Companding Curves
The companding function is used to simulate the gamma curve and do non-linear transformation before
the data is output. There are 4 curves selected by setting register Compand_Sel as shown in Figure 3.2
and this function is also Enable / Disable by user.
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
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PAS5101PE pdf, datenblatt
PAS5101PE Specification
4.2. Data Transfer Format
4.2.1. Master transmits data to salve ( write cycle )
z S : Start.
z A : Acknowledge by salve.
z P : Stop.
z RW : The LSB of 1ST byte to decide whether current cycle is read or write cycle. RW = 1 –
Read cycle, RW = 0 – Write cycle.
z SUBADDRESS : The address values of PAS5101PE internal control registers. ( Please refer
www.DataSheet4U.com to PAS5101PE register description )
During write cycle, the master generates start condition and then places the 1st byte data that are
combined slave address ( 7 bits ) with a read / write control bit to SDA line. After slave ( PAS5101PE )
issues acknowledgment, the master places 2nd byte ( Sub Address ) data on SDA line. Again follow the
PAS5101PE acknowledgment, the master places the 8 bits data on SDA line and transmit to PAS5101PE
control register ( address was assigned by 2nd byte ). After PAS5101PE issue acknowledgment, the master
can generate a stop condition to end of this write cycle. In the condition of multi-byte write, the
PAS5101PE sub-address is automatically increment after each DATA byte transferred. The data and A
cycles is repeat until last byte write. Every control registers value inside PAS5101PE can be
programming via this way.
4.2.2. Slave transmits data to master ( read cycle )
z The sub-address was taken from previous write cycle.
z The sub-address is automatically increment after each byte read.
z Am : Acknowledge by master.
z Note there is no acknowledgment from master after last byte read.
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
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v1.0 2005/4/27

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