AR0230CS/D Rev. 8, Pub. 11/15 EN 7 ©Semiconductor Components Industries, LLC, 2015.
AR0230CS: 1/2.7-Inch 2.1 Mp/Full HD Digital Image Sensor
Functional Overview
Functional Overview
The AR0230CS is a progressive-scan sensor that generates a stream of pixel data at a
constant frame rate. It uses an on-chip, phase-locked loop (PLL) that can be optionally
enabled to generate all internal clocks from a single master input clock running between
6 and 48 MHz. The maximum output pixel rate is 148.5 Mp/s, corresponding to a clock
rate of 74.25 MHz. Figure 1 shows a block diagram of the sensor configured in linear
mode, and in HDR mode.
Figure 1: Block Diagram of AR0230CS
User interaction with the sensor is through the two-wire serial bus, which communi-
cates with the array control, analog signal chain, and digital signal chain. The core of the
sensor is a 2.1 Mp Active- Pixel Sensor array. The timing and control circuitry sequences
through the rows of the array, resetting and then reading each row in turn. In the time
interval between resetting a row and reading that row, the pixels in the row integrate
incident light. The exposure is controlled by varying the time interval between reset and
readout. Once a row has been read, the data from the columns is sequenced through an
analog signal chain (providing offset correction and gain), and then through an analog-
to-digital converter (ADC). The output from the ADC is a 12-bit value for each pixel in
the array. The ADC output passes through a digital processing signal chain (which
provides further data path corrections and applies digital gain). The sensor also offers a
Row Noise Correction
Black Level Correction
Test Pattern Generator
Pixel Defect Correction
Adaptive CD Filter
Digital Gain and Pedestal
A-Law Compression
Parallel
HiSPi
12 bits
10 bits
12
12
ADC Data
HDR Linearization
Smoothing Filter
Digital Gain and Pedestal
Companding or ALTM
Parallel HiSPi
12 bits
16
14 or 12 bits
16 bits
Row Noise Correction
Black Level Correction
Test Pattern Generator
Pixel Defect Correction
Adaptive CD Filter
Motion Correction
12
12
ADC Data
HDR Linearization
In Linear Mode In HDR Mode
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