Texas Instruments DRV821 EVM Series, Руководство пользователя, Страница: 6 / 16

4 MODE/nSLEEP Jumper and Speed-Adjustment Potentiometers
The MODE/nSLEEP header (J2) and jumper allow the user to set the state of the MODE pin or nSLEEP pin
depending on the device populated on the EVM. If the DRV821xDSG is populated, J2 allows the user to select
from the input modes of PWM (GND), PH/EN (3.3 V), and independent half-bridge control (Hi-Z).
If the DRV821xPDSG is populated, J2 allow the user to set the device to a low-power sleep mode (GND) or to
enable the device (3.3V). MODE is only applicable to the DRV821xDSG and DRV8220DSG. The inputs to the
DRV821xDSG are EN/IN1 and PH/IN2. The functions of these inputs are IN1 and IN2 when the MODE is GND
(PWM mode) or Hi-Z (independent half-bridge mode). When MODE is connected to 3.3 V (PH/EN control mode)
the input function is a phase/enable (PH/EN) interface.
The MSP430 produces PWM signals for the EN/IN1 and PH/IN2 pins with duty cycles proportional to the voltage
from the PWM potentiometers. The tables below show how to configure the potentiometers for each MODE
configuration.
Figure 4-1. MODE /nSLEEP header and PWM Potentiometers
MODE/nSLEEP Jumper and Speed-Adjustment Potentiometers www.ti.com
6 DRV821xEVM and DRV8220EVM User's Guide SLOU540A – NOVEMBER 2020 – REVISED DECEMBER 2020
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