GL646USB
1. GENERAL DESCRIPTION
Genesys Logic's single-chip GeneScan
TM
II, GL646USB, is a high speed, high performance, low cost and rich scalability
controller for scanner. It successfully integrates AFE (16 bits Analog Front End), featured scanner function ASIC and
USB 1.1 interface controller into one single-chip. With it’s high performance design architecture, GeneScan
TM
II is not
only ready for supporting CIS or CCD image sensors (600dpi or 1200dpi resolution) which is used in flatbed or
transparency scanners, but also can co-work with uni-polar or bi-polar stepping motors. Advanced features of
GeneScan
TM
II includes loseless image data compression, dual motor acceleration/ deceleration curve table for high speed
motor moving, industrial standard auto suspend mode and bus-power supporting.
Except the build-in USB 1.1 interface, the capability of cooperating with USB 2.0 and IEEE 1394 interface controller
also expand the scalability of GeneScan
TM
II to fit customer's further requirement of supporting high speed interface
standards.
2. FEATURES
Design for sheetfed, flatbed and transparency scanner.
Programmable 600,1200 or 2400 DPI color CCD or CIS timing
Support fast scan for low DPI such as pre-view
Support three scanning type :pixel by pixel(pixel rate), line by line(line rate) and RGB line by turns(line rate)
Programmable dummy lines to resolve start/stop (discontinuous) problem.
48-Bits true color ( 16-Bits gray level ) scan
Support color , fine Gray , fast gray and fast B/W scan for CCD
Support color , gray , true gray and B/W scan for CIS
Built-in 16 bits Front End
16 Bits white shading , dark shading
Programming threshold level for B/W
Exposure time is adjustable (max.524ms , 1 pixel time increment step)
Scan width(scan area) control for horizontal line( 1 pixel increment step)
Built-in USB(1.1) , external USB(2.0) and external IEEE1394 interface
Support 4M bits x 1 or x2 (256K x 16) EDO DRAM
Support digital average for DPI (non-deletion type)
Support hardware deletion type for DPI (2400 to 1 DPI ,1 DPI decrement)
Acceleration/ Deceleration double table for high speed motor moving
Stepping motor phase control ports for bi-polar or uni-polar motor
Full, half and quarter steps for motor control
Build-in Uni-polar phase PWM control
Watch-Dog protection circuit for motor, lamp and ASIC system
2 Output ports for lamp (include flatbed and transparency with PWM) control
Input port for home sensor
9 GPIO ports
Lamp timeout (sleeping) control
-2-
and 12/14 Bits GAMMA correction
Rev. 1.4
GENESYS [ GENESYS LOGIC ]
