GL843 datasheet(76/84 Pages) GENESYS

76 / 84 page

GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x

Page 76

MTR_PH 0~7 for bipolar motors

MTR_PH 0~3 for unipolar motors

A. Bipolar motors:

a. Supports 2916 motor driver timing and 2916 compatible driver IC, such as L6219.

Include full, half and quarter steps control.

b. Supports 3955 motor driver timing.

Include full, half, quarter and eighth steps control.

c. Supports 3967 motor driver timing.

Include full, half, quarter and eighth steps control.

d. Supports LB1939, 1940 motor driver timing.

Include full and half steps control

B. Unipolar motors:

a. Supports 2003 motor driver timing and 2003 compatible driver IC.

b. Include full step two phases on, full step single phase on and half step.

c. PWM control, include frequency and duty controls.

PWM

Duty

Frequency

Phase on time

22 Watchdog Protection

This function can automatically reset the system to initial state when the system is hanged (no access signal)

beyond the time limit. It can be enabled or disabled by S/W.

This function can protect motor power, lamp power and ASIC system.

Calculation formula: (30sec.) * (times setting) * (setting number.).

The range of setting number is from 1 to 15; the range of times setting is 0 or 1.

23 Lamp Time-out Control

This circuitry can automatically turn off the lamp power when this function is enabled. It can be enabled or

disabled by S/W.

Calculation formula: (60sec.) * (times setting) * (setting number).

The range of setting number is from 1 to 7;the range of times setting is 0 to 3.

24 Lamp Power Control

These are two power control ports for lamp. One is for Flatbed and the other is for XPA (Transparency or film).

These control ports have PWM function. According to the system clock, designers can flexibly adjust their

frequency and duty by S/W. And the resolution of PWM is 16 bits.

25 Sensors

The system supports home sensor for flatbed; ADF sensor, document sensor and cover sensor for ADF module.

26 GPIO Ports

Designers can separately assign input or output direction for each GPIO pin of GPIO1~20 and GPIO27. Some

GPIO can be designed for keypads, document sensor of sheetfed or motor power control…etc.

Designers can assign GPIO27 as general-purpose input/output port or as ADF sensor input.

Note : There are two pins for special function. One is GPIO12 and the other is GPIO11.

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..

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