Mfx (Multi-Function Expander); Table 15. Motor Control Related Solder Bridges; Table 16. Mfx Signals - ST User Manual User Manual

Hardware layout and configuration
Figure 7. STM32746G-EVAL evaluation board motor control PCB
1. To remove R95 and R100, open SB5 and mount R14
Solder
Bridges
SB1
SB2
5.20

MFX (Multi-Function eXpander)

There is a MFX circuit on STM32746G-EVAL evaluation board as IO-expander and driver
for 2 LEDs.The communication interface between MFX and STM32F746NGH6 is I2C1 bus.
The signals connected to MFX are listed in
Pin
Pin name of
number
of MFX
11 PA1
13 PA3
28/79
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Table 15. Motor control related solder bridges

The special motor current sampling operation is enabled when SB1 is closed (PA12
connected to PA8). The I/O pins PA12 and PA8 are disconnected and can be used
by daughterboard when SB1 is not fitted.
Default setting: Open
SB2 should be kept open when encoder signal is from pin 31 of motor control
connector CN1, while it should be kept closed when analog signal is from pin 31 of
CN1 for special motor.
Default setting: Open

Table 16. MFX signals

MFX functions
MFX
MFX_GPO1
MFX_GPO3
DocID027916 Rev 2
Description
Table 16.
Functions of Direction
STM32746G-EVAL (For MFX)
LED2 Output
LED4 Output
UM1902
Terminal
device
LED
LED