Rohm STEPMO_EVK_20x, Manual

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STEPMO_EVK_20x Evaluation Board Manual
EUDC59-U-002 - Rev. 1.3
4. Setup Instruction
4.1 Hardware
● Master/Slave Mode
This section describes how to set up the Shield in Master or Slave mode. This selection is made by Jumper J1. In most of the
configurations (default) the Jumper J1 is simply left open and the Shield is configured as Master. Jumper J1 needs only to be in
closed position when the Shield is stacked as a Slave Board on a Master Board for operation of two Shields with a single Arduino
microcontroller. The Arduino microcontroller (and optional Slave Shield) will be powered by the Master Shield.
Note:

For the electrical operation the physical order of Master and Slave Shield actually does not matter.

Do not change the setting of J1 while the power supply is applied.
Master Board (Default)
Jumper J1 is
open :

Buck regulator supply (7V) is enabled to generate VIN for Arduino

Green LED of D2 is lit

Arduino IO mapping according to the following table
ALL Model EVK Versions except C, E
ARDUINO IO Schematic MUX Routing Between Signal Motor Driver IC Pin
No. Net Name Pin Pin Name No. Name
A1 PS1 IC1_X1 IC1_X PS 14 PS
3 ENABLE1 IC1_Y1 IC1_Y ENABLE 20 ENABLE
7 MODE11 IC1_W1 IC1_W MODE1 19 MODE1
6 MODE01 IC1_Z1 IC1_Z MODE0 18 MODE0
13 CW_CCW1 IC2_Y1 IC2_Y CW_CCW 16 CW_CCW
10 CLK1 IC2_W1 IC2_W CLK 15 CLK
Model EVK Versions C, E
ARDUINO IO Schematic MUX Routing Between Signal Motor Driver IC Pin
No. Net Name Pin Pin Name No. Name
A1 PS1 IC1_X1 IC1_X PS 14 PS
3 ENABLE1 IC1_Y1 IC1_Y ENABLE 20 I12
7 MODE11 IC1_W1 IC1_W MODE1 19 I02
6 MODE01 IC1_Z1 IC1_Z MODE0 18 PHASE2
11 TEST11 IC2_X1 IC2_X TEST1 17 I11
13 CW_CCW1 IC2_Y1 IC2_Y CW_CCW 16 I01
10 CLK1 IC2_W1 IC2_W CLK 15 PHASE1
Table 3: Mapping of Arduino IOs to the motor driver IC pins (Master Shield)