Hardware layout and configuration
UM2408
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UM2408 Rev 1
6.6 LEDs
User LD1:
a green user LED is connected to the STM32H7 I/O PB0 (SB39 ON and SB47
OFF) or PA5 (SB65 ON and SB54 OFF) corresponding to the ST Zio D13.
User LD2:
a yellow user LED is connected to PE1.
User LD3:
a red user LED is connected to PB14.
Caution:
LD3 cannot be used if ZIO D65 is used (in this case, please remove R75).
These user LEDs are on when the I/O is HIGH value, and are off when the I/O is LOW.
LD4 COM:
the tricolor LED LD4 (green, orange, red) provides information about ST-LINK
communication status. LD4 default color is red. LD4 turns to green to indicate that
communication is in progress between the PC and the ST-LINK/V3, with the following setup:
•
Slow blinking red/off: at power-on before USB initialization
•
Fast blinking red/off: after the first correct communication between PC and
ST-LINK/V3 (enumeration)
•
Red LED on: when the initialization between the PC and ST-LINK/V3 is complete
•
Green LED on: after a successful target communication initialization
•
Blinking red/green: during communication with target
•
Green on: communication finished and successful
•
Orange on: communication failure
LD5 PWR:
the green LED indicates that the STM32H7 part is powered and +5 V power is
available on CN8 pin 9 and CN11 pin 18.
Table 11. External SMPS selection
CN6 pin
Pin name
Function
Configuration when
using external module
connected to CN6
CN6 Pin 1
3V3_VDD
3.3V VDD supply for MCU
-
CN6 Pin 2
SMPS_V1 (PG8)
External SMPS output voltage
selection “D1”
(1)
1. please see ST1PS02D1QTR datasheet for more information about possible use cases.
SB34 ON / SB31 OFF
CN6 pin 3
VOUTVDD
External 3.3V VDD supply for
MCU
-
CN6 Pin 4
SMPS_EN (PG9)
External SMPS Enable “EN” (*)
SB35 ON / SB41 OFF
CN6 pin 5
1V2_VOUTCORE
External SMPS 1.2V or external
power supply providing 1.2V for
MCU VCORE (VCAP pins)
-
CN6 Pin 6
SMPS_SW (PG10)
External SMPS Enable for the
auxiliary output voltage “AUX” (*)
SB33 ON / SB30 OFF
CN6 pin 7
GND
GND
-
CN6 Pin 8
SMPS_PG (PG12)
External SMPS Power good
“PGOOD” (*)
SB42 ON / SB45 OFF
