HT82V72数据手册Holtek中文资料规格书

描述 Description

The HT82V72 is a fully integrated device for CIS imaging application. It features two high performance 16-bit 3-channel 60MSPS analog signal processors, programmable timing generator and image sensor shading correction to sample and condition the outputs of CIS (Contact Image Sensor) array for highspeed double-sided scanner applications.

Each channel consists of a Sample and Hold Amplifier, SHA, a 9-bit Programmable Gain Amplifier, PGA, and an 8-bit offset correction Digital to Analog Converter, DAC. The PGA and offset DAC are programmed independently allowing unique values of gain and offset for the two 3-channel analog inputs. Each the 3-channel signals are routed to a 60MHz high performance Analog to Digital converter, ADC. Then an intelligent image sensor shading correction is mployed to unitize each sensor elements. The sensor data can be not only corrected but also averaged per line for black level calculation. The Video Processing Front End, VPFE, Interface multiplexes shaded ADC’s outputs in a two high-bytes of each ADC’s output or one 16-bit wide output of each ADC. A pixel clock PCLK transports the 16-bit wide data to the output port.

The internal registers are programmed through a 2-wire I2C or 3-wire/4-wire SPI interface, for timing control, gain, offset and operating mode adjustments.

 

特性 Features

• 3.3V operating voltage
• Up to 120MSPS for two 3-channel inputs
• Programmable CIS module timing generator
• 9-bit programmable gain amplifier
• 8-bit programmable offset
• 4-bit programmable line-clamping bias
• Internal voltage reference
• Image sensor shading correction
- 0 ~ -255 8-bit dark shading (offset) correction
- 0.00x~8.00x 10-bit white shading (gain) correction
- Embedded memory for up to 6 component coefficients
of 1584 sensor elements
• Flexible frame start/stop control mechanism
• Provide Image line information
- line index
- Left and right boundary of a line
- max/min/summation/histogram information of a line
• 8/16-bit image data output in VPFE or EMIF interface
• 3-wire/4-wire SPI interface
• 2-wire I2C interface
• Built in voltage comparator for roller input signal
• 64-pin TQFP-EP package