Datasheet 搜索 > Pololu Robotics & Electronics > DRV8835 FOR RASPBERRY PI B+ 数据手册 > DRV8835 FOR RASPBERRY PI B+ 其他数据使用手册 5/8 页
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DRV8835 FOR RASPBERRY PI B+ 其他数据使用手册 - Pololu Robotics & Electronics
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Pololu Robotics & Electronics
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DRV8835 FOR RASPBERRY PI B+数据手册
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By default, the driver is configured to operate in PHASE/ENABLE mode, in which a PWM signal
applied to the ENABLE pin determines motor speed and the digital state of the PHASE pin
determines direction of motor rotation. GPIO 12 and 5 are used to control the speed and direction,
respectively, of motor 1, and GPIO 13 and 6 control the speed and direction of motor 2. The table
below shows how the inputs affect the outputs in this mode:
Drive/brake operation in default PHASE/ENABLE mode
xPHASE xENABLE MxA MxB operating mode
1 PWM L PWM reverse/brake at speed PWM %
0 PWM PWM L forward/brake at speed PWM %
X 0 L L
brake low (outputs shorted to
ground)
PHASE/ENABLE mode should be suitable for most applications.
Configuring the board for IN/IN mode
The operating mode of the driver is controlled by the MODE pin, which the board pulls high to VCC
through a 20 kΩ resistor to select PHASE/ENABLE mode by default. The pin labeled “MODE” can
be driven low (or connected directly to ground) to switch the control interface to IN/IN, which allows
for slightly more advanced control options as described in the table below:
Drive/coast or drive/brake operation with MODE=0 (IN/IN)
xIN1 xIN2 MxA MxB operating mode
0 0 OPEN OPEN coast (outputs off)
0 PWM L PWM reverse/coast at speed PWM %
PWM 0 PWM L forward/coast at speed PWM %
PWM 1 L PWM
reverse/brake at speed 100% − PWM
%
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