Texas Instruments DRV887 Series, Руководство пользователя

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PMODE Jumper and Speed-Adjustment Potentiometers
7 SLVUBG7C – August 2018 – Revised December 2019
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DRV8876/74 Evaluation Module
5.2 PWM Control Mode (PMODE = Logic High)
When the PMODE pin is logic high on power up, the device latches into PWM mode ( Figure 4 ). PWM
mode allows for the H-bridge to enter the Hi-Z state without taking the nSLEEP pin logic low. The truth
table for PWM mode is shown in
Table 2 . This method is best for bidirectional driving for one motor.
Figure 4. PMODE jumper configuration for PWM
Table 2. PWM Control Mode
IN1 IN2 OUT1 OUT2 DESCRIPTION
LOW - turn
IN1 PWM
completely
counterclock
wise
LOW - turn
IN2 PWM
completely
counterclock
wise
Hi-Z Hi-Z Coast, (H-Bridge Hi-Z)
LOW - turn
IN1 PWM
completely
counterclock
wise
PWM - set
IN2 PWM pot
in any
position
L H Reverse (OUT2 → OUT1)
PWM - set
IN1 PWM pot
in any
position
LOW - turn
IN2 PWM
completely
counterclock
wise
H L Forward (OUT1 → OUT2)
HIGH - turn
IN1 PWM
completely
clockwise
HIGH - turn
IN2 PWM
completely
clockwise
L L Brake, (Low-Side Slow Decay)