Texas Instruments DRV821 EVM Series, User Manual, Page: 3 / 16

1 Introduction
The DRV821x/8220EVM is a complete solution for evaluating the DRV821x/8220 H-bridge motor drivers. The
evaluation module (EVM) can support the DSG, PDSG, and DRL package variants of the DRV8210/12/20
devices. However, only one component can be populated at a time since the input control signals (EN/IN1 and
PH/IN2) are shared among the two components.
The EVM includes current sensing circuitry using a current sensing resistor and current sense amplifier (for
additional details about the current sensing see
Section 3 ). The EVM includes an MSP430 ™ microcontroller that
is preprogrammed to take input from two dedicated analog potentiometers for PWM speed control of one or two
brushed DC motors. The jumper on the PMODE/nSLEEP pin (J2) allows the user to select the input control
mode or the sleep state of the driver depending on which component is populated on the EVM (further details
are provided in
Section 2 ).
Power can be provided externally up to 11 V for the DRV8210/12 and 18V for the DRV8220 through the power
header. To expand beyond the included firmware capability, the MSP430 MCU can be reprogrammed through
the eZ-FET
™ emulation circuit found in most MSP430 Launchpads. We recommend the MSP-EXP430FR5969 .
Note that a four pin angled male header is required and must be soldered to J21 of this Launchpad from V+ pin
to GND pin. We recommend a pin header with pin dimensions similar to 850-10-050-20-001000 (Digikey part
number). The U1 MCU must be removed from the Launchpad.
2 Power Connectors
The DRV821x/8220EVM uses a single header for power entry to the EVM board. Only a single power supply rail
is necessary since an onboard 3.3-V regulator provides power to the MSP430. The minimum recommended VM
voltage for the EVM is 1.65 V and the maximum is 18 V. For complete voltage range information of the driver
itself, refer to the device.
As previously mentioned, the MSP430 comes preprogrammed to control basic DC motor operation. If changing
the firmware via the external eZ-FET™ emulation tool, do not supply power to the VM connector on the EVM.
The eZ-FET™ board provides the necessary power during programming when connected to the J6 connector.
Note that a four-pin angled male header is required and must be soldered to J21 of this Launchpad from V+ pin
to GND pin shown in
Figure 2-1 . We recommend a pin header with pin dimensions similar to the Digikey part
number 850-10-050-20-001000. The U1 MCU must be removed from the Launchpad.
www.ti.com Introduction
SLOU540A – NOVEMBER 2020 – REVISED DECEMBER 2020
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DRV821xEVM and DRV8220EVM User's Guide 3
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