6.b. Accessing nD2 and nSF Pins Separately for Each Channel
The shield combines the two motor driver chips’ D2 and SF pins in order to decrease the number of I/
O lines required to control the motors. The combined lines are sufficient for most applications, but you
can modify the board to get independent access to the MxD2 and MxSF pins if you want the additional
control and information.
There are two pairs of 0.1″-spaced holes on the shield labeled “D2 1=2” and “SF 1=2”. These pairs
are connected on the underside of the PCB by a thin trace, with the holes labeled “M1” connecting to
the M1 driver and the holes labeled “M2” connecting to M2 driver.
Cuttable traces on the dual MC33926 motor
driver shield for accessing nD2 and nSF
separately on each driver IC.
The following diagrams shows the relevant sections of the board schematic:
Pololu Dual MC33926 Motor Driver Shield User’s Guide
© 2001–2017 Pololu Corporation
6. Customizing the Shield
Page 29 of 30
