User guide
22 of 32
V. 1.0
2020-11-03
EVAL-M1-101TF user guide
iMOTION™ Modular Application Design Kit
System and functional description
𝑴𝒐𝒕𝒐𝒓 𝒔𝒑𝒆𝒆𝒅(𝑹𝑷𝑴) =
𝑷𝑮𝑶𝑼𝑻 𝑭𝒓𝒆𝒖𝒒𝒆𝒏𝒄𝒚(𝑯𝒛) ∗ 𝟔𝟎𝐬
𝑷𝒖𝒍𝒔𝒆 𝑷𝒆𝒓 𝑹𝒆𝒗𝒐𝒍𝒖𝒕𝒊𝒐𝒏
For example, the PGOUT frequency is about 80 Hz and the pulse per revolution is 6, the motor speed will then
be 800 RPM.
By default, VDD is 3.3V for the EVAL-M1-101T. The input of Vsp and PGOUT (pulse generation output) should be
limited within the voltage range of 0 and 3.3V. While for some application, PGOUT should be connected to
speed measurement circuit. The evaluation board EVAL-M1-101T provides FG (Frequency Generation) signal
with an open drain structure controlled by PGOUT as shown in Figure 23. And FG signal can be pull up to 30V.
The frequency of FG is the same as PGOUT, and the calculation equation for motor speed is the same.
Figure 23
VSP Input Connector and level shit schematic for FG