GL848 datasheet(80/85 Pages) GENESYS

80 / 85 page

GL848 High Speed USB2.0 2-in-1 Scanner Controller With Fast ADF

Page 80

Imax current.

GPIO12: 1. Pull up by resistor to indicate ASIC to turn on lamp power in power-on initial state.

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.

GPIO11: This pin can control bipolar motor driver IC (2916,6219 or 3967) Vref0 for control

Imax current.

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.

Document

Sensor

ADF

Sensor

Document Sheet

Scanning Window

PREFED

GL848 Datasheet(PDF) 80 Page - GENESYS LOGIC