gl848 Genesys Logic, gl848 Datasheet - Page 80

• Manufacturer Part Number: gl848
• Description: High Speed Usb 2.0 2-in-1 Scanner Controller With Fast Adf & Bus Power
• Manufacturer: Genesys Logic

Document Sheet
27 GPO28, 31~34 Ports
GL848 provides 5 ports for general-purpose output. They are multi-functions.
28 Power on Check
The default status of the PWRBIT control bit is reset. Programmers can set the PWRBIT control bit before
controlling the ASIC. GL848 will keep the status until power is turn off. This operation is to check if the
power had been turned off or not.
30 LED Blinking
GL848 supports LED -blinking function. It is implemented in GPIO8~10 and GPIO21.
31 Support Back Scanning
GL848 supports forward or backward scanning.
32 Supports ADF Function
GL848 supports ADF (Auto-document-feeder) function via internal logic circuitry. Programmers need to set
the ADFSEL control bit to logic ‘1’. GPIO6 controls the motor pulse trigger if the motor moving of ADF
module is implemented by trigger pulse, otherwise the motor moving is driven by motor phases. GPO28
controls the moving direction of motor if ADF module is necessary. GPIO16 is the cover sensor input,
ADF_SENR is the ADF sensor input and HOME is document sensor input under ADF mode.
GL848 can feed document sheets automatically to scanning window. After sensing the present of document by
document sensor, software should issue feed command to GL848 for paper feeding. After document sheet
reaches ADF sensor, scanning process will be started after PREFED motor steps.
©2000-2007 Genesys Logic Inc. - All rights reserved.
GPIO12: 1. Pull up by resistor to indicate ASIC to turn on lamp power in power-on initial state.
GPIO11: This pin can control bipolar motor driver IC (2916,6219 or 3967) Vref0 for control
Imax current.
2. Pull down by resistor to indicate ASIC to turn off lamp power in power-on initial state..
3. This pin can control bipolar motor driver IC (2916,6219 or 3967) Vref1 for controlling
Imax current.
GL848 High Speed USB2.0 2-in-1 Scanner Controller With Fast ADF
Imax current.
Document
Sensor
Sensor
ADF
PREFED
Scanning Window
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