DocID030906 Rev 2
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UM2271
Hardware layout and configuration
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Other LEDs are present on the 32L4R9IDISCOVERY. Find below a summary list of all
buttons and LEDs, with their description.
Table 11. LD1 and LD2 details
LED
MCU port control
color
LD1
PB0 (MFX_GPIO0 from MFX)
Orange
LD2
PH4 (from main MCU)
Green
Table 12. Buttons and LEDs
Reference
Color
Function
Comment
B1
black
RESET
For MCU, OCTO-SPI Flash, MFX_V3, CAMERA
B2
blue
SELECT
with Wake-up alternate function, PC13
UP
MFX_GPIO1, PB1
DOWN
MFX_GPIO2, PB2
RIGHT
MFX_GPIO3, PB3
LEFT
MFX_GPIO4, PB4
LD1
orange
USER1
MFX_GPIO0, PB0
LD2
green
USER2
PH4
LD3
green
ARDUINO
PB13
LD4
red/green
ST-LINK COM
Green during communication
LD5
red
ST-LINK USB FAULT
Current higher than 625 mA
LD6
green
VBUS USB OTG FS
Status also available on PA9
LD7
red
USB OTG FS OVCR
Overcurrent detection, also on MFX_GPIO14, PB14
LD8
green
5V POWER
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