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Hardware Overview
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3.1 Connectors
The DRV201EVM has connectors for power and I
2
C communications. J1 provides a possibility to power
EVM from an external power supply (between 2.5 V and 4.8 V). USB adapter interface adapter has a 3.3-
V power output that can be used to power the board so there is no need for external power source.
P1 header provides the I
2
C communication interface to the DRV201EVM. The USB Interface Adapter
includes a ribbon cable that can be connected to P1. The adapter is connected to a Windows-based PC.
WARNING
When using external power DRV201EVM, it should be noted that
the recommended supply range for DRV201 is from 2.5 V to 4.8 V.
3.2 Jumpers
The DRV201EVM operation can be configured using jumpers:
• Board power from external supply or USB interface adapter
• Driving on board inductor and resistor or external VCM actuator
See Table 1 for descriptions and default settings for the jumpers on the DRV201EVM.
Table 1. DRV201EVM Jumpers
NUMBER FUNCTION DEFAULT SETTING
Board power supply selection. Connect to pins 1-2 when using
Pins 1-2 (power from USB
P2 3.3 V from the USB interface adapter and pins 2-3 if external
interface adapter)
power supply is used.
R_VCM and L_VCM are connected between DRV201 pins
JP1 and JP2 jumpers
JP1 andJP2 I
SOURCE
and I
SINK
. If jumpers are not connected, VCM actuator
connected
can be connected between I
SOURCE
and I
SINK
.
3.3 Test Points
The DRV201EVM provides test points that can be used for evaluation. Important voltages can be
monitored with a meter through the use of the test points.
3.4 EVM Operation
The DRV201EVM operates from either a USB interface adapter (through P1) or an external power supply
(through J1). Jumper P2 can be used to select the power source as described in
Section 3.2 . Use the
following steps to set up the DRV201EVM.
1. Connect the USB interface adapter to the DRV201EVM P1 connector using the ribbon cable provided.
2. Plug the appropriate end of the USB cable into the adapter and the other end into your PC.
NOTE: If using an external power supply, connect jumper’s pins 2-3 and use J1 to connect the
power supply.
6 DRV201 Evaluation Module SLVU528 – March 2012
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