Software Flowchart - Acer AL1721h Service Manual

Software Flow Chart
MCU initialize
Is the eeprom blank ?
Get the PWM value of brightness from eeprom.
Is the power key pressed ?
Clear all global flags.
Are the
SELECT keys pressed ?
Save the power key status into eeprom.Turn on the
LED and set it to green color.Scaler initialize.
In standby mode ?
N Check the analog port, are there
any signals coming ?
Wake up the scalar. ?
N
Process the
OSD display.
N
Y
AUTO and
Y
N
Y
Y
Program the scalar to be able to show the coming mode.
Read the keyboard. Is the power key pressed ?
Y
Y
Program the eeprom
by default values.
N
N
Enter factory mode.
Update the life time of back light.
Does the scalar send out a
interrupt request ?
Y
Are there any signals
coming from analog port ?
Y
17
N
Display "No connection Check
N
Signal Cable" message. And go
into standby mode after the
message disappear.