6.20 MFX (multifunction eXpander)
MFX circuit on STM32H7x7I-EVAL Evaluation board acts as IO-expander. The communication interface between
MFX and STM32H7x7XI is I2C1 bus.
The signals connected to MFX are listed in Table 17. MFX signals.
Table 17. MFX signals
Pin number of MFX Pin name of MFX MFX functions Function of STM32H7x7I-EVAL
Direction
(for MFX)
Terminal device
15 PA5 MFX_GPIO5 Audio_INT Input Codec
16 PA6 MFX_GPIO6 OTG_FS2_ OverCurrent Input USB_FS2
17 PA7 MFX_GPIO7 OTG_FS2_ PowerSwitchOn Output USB_FS2
18 PB0 MFX_GPIO0 JOY_SEL Input Joystick
19 PB1 MFX_GPIO1 JOY_DOWN Input Joystick
20 PB2 MFX_GPIO2 JOY_LEFT Input Joystick
26 PB13 MFX_GPIO13 SD_LDO_SEL Output microSD
27 PB14 MFX_GPIO14 TOUCH_INT Input LCD
28 PB15 MFX_GPIO15 MicroSDcard Detect Input microSD
29 PA8 MFX_GPIO8 OTG_FS1_ OverCurrent Input USB_FS1
30 PA9 MFX_GPIO9 OTG_FS1_ PowerSwitchOn Output USB_FS1
31 PA10 MFX_GPIO10 - - -
32 PA11 MFX_GPIO11 - - -
33 PA12 MFX_GPIO12 - - -
39 PB3 MFX_GPIO3 JOY_RIGHT Input Joystick
40 PB4 MFX_GPIO4 JOY_UP Input Joystick
UM2525
MFX (multifunction eXpander)
UM2525 - Rev 3
page 21/69
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