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2.0 Module Description
2.1 Block Diagram
The NEDSP 1901 module has the facility to be preset or adjusted during operation. Digital input
control the functions. These incorporate internal pull-up resistors so they can be left floating when
not in use.
The audio signals into and out of the module are capacitor coupled to ensure that no DC levels are
pulled down or shorted when the module is used embodied as part of existing equipment.
The on-board voltage regulator allows the module to operate from a wide supply voltage (5 to 15
Volts) range. However, to keep the power dissipation (heat) down, it is advisable to use as low as
possible supply voltage. The Power supply input is reverse polarity protected.
Figure 2. NEDSP1901 Block Diagram
