1
Board overview
The main characteristics of the board are:
•
Supply voltage from 7 V to 45 V
•
Output current up to 1.5 A rms for each motor phase
•
Peak current regulation through trimmer
•
Form factor and connectivity compatible with RAMPS (RepRap Arduino Mega Pololu Shield) or similar
boards
•
Based on STSPIN820 driver featuring:
–
Stepper motor driving with a microstepping resolution up to 1/256
th
of step
–
Overcurrent, short-circuit and overtemperature protections
Figure 1.
Board overview
Table 1.
Board pinout
J1
Signal
J2
Signal
8
Enable (EN)
1
Motor supply voltage (VM)
7
Step mode selection input (M0)
2
Ground
6
Step mode selection input (M1)
3
Phase B out 1 (OUTB1)
5
Step mode selection input (M2)
4
Phase B out 2 (OUTB2)
4
NC
5
Phase A out 2 (OUTA2)
3
Active low standby (nSTBY)
6
Phase A out 1 (OUTA1)
2
Step-clock input (STEP)
7
Logic supply voltage (VDD)
1
Direction input (DIR)
8
Ground
UM2434
Board overview
UM2434
-
Rev 1
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