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
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