User guide

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Test Mode
The BCD inputs are also used to enter test mode.
When Test mode is active, the DMX512 input is disabled.
When the Hundred inputs are set to either ‘6’ or ‘7’ Test mode is
active. The Hundred input sets the motor channel, while the Ten and
Units inputs select the position.
The following examples show the operation:
Hundreds Tens Units Output DMX Input
0 0 0 No Function Off
0 0 1 Normal Operation On
5 1 2 Normal Operation On
6 0 0 Motor A Min Position Off
6 5 0 Motor A Centre Position Off
6 9 9 Motor A Max Position Off
7 0 0 Motor B Min Position Off
7 5 0 Motor B Centre Position Off
7 9 9 Motor B Max Position Off
Power
Supply
The AL4100 requires a 5V DC supply at approximately 6mA
All Ground and Vcc pins must be connected.
The device is CMOS so normal handling precautions should be
adhered to.
Good decoupling and pcb layout conventions (i.e. fill all unused pcb
areas with grounded copper planes) should be followed.
Particular attention should be paid to routing the crystal
connections.
Crystal
The AL4100 requires a 16MHz, fundamental mode crystal. A tuning
capacitance of approximately 12pF is suggested between each crystal
connection and Ground. The inherent pcb and lead capacitance must
be included in this.