ST STM32MP257F-EV1 User Manual page 14

6.5.4 STPMIC25APQR power supply
For general information concerning STPMIC25APQR, refer to the datasheet on the
For the boot on the SD card (EV1 application), the STPMIC25APQR NVM is programmed to enable LDO7 and
LDO8.
For information about STPMIC25APQR NVM, refer to the application note How to use STPMIC25 for a wall
adapter powered application on STM32MP25x lines MPUs (AN5727).
STPMIC25APQR supply
• VDDCPU (BUCK1) used to supply the CPU1 of the STM32MP257
– Value: 670 mV LPLV-STOP1
– Value: 800 mV RUN at 1.2 GHz
– Value: 910 mV RUN at 1.5 GHz
• VDDCORE (BUCK2) used to supply the digital logic of the STM32MP257
– Value: 670 mV LPLV-STOP
– Value: 820 mV RUN
• VDDGPU (BUCK3) used to supply the GPU of the STM32MP257
– Value: 800 mV RUN at 800 MHz
– Value: 900 mV RUN at 900 MHz
• VDDIO (BUCK4) used to supply the VDD domains of the STM32MP257
– Value: 3.3 V
• 1V8 (BUCK5) used to supply the 1.8V analog domain of the STM32MP257
– Value: 1.8 V
• VDD_DDR (BUCK6) used to supply the DDR4
– Value: 1.2 V
• 3V3 (BUCK7) used to supply some of the 3.3V domains of the STM32MP257F-EV1 peripherals
– Value: 3.3 V
• VREF_DDR provides the DDR reference voltage
– Value: 0.6 V
• VDDA1V8_ON (LDO1) used to supply the 1.8 V always ON domain of the STM32MP257
– Value: 1.8 V
• VDD_EMMC (LDO2) used to supply the eMMC memory
– Value: 3.3 V
• VTT_DDR (LD03) used to supply the DDR4 termination
– Value: 0.6 V
• VDD3V3_USB (LD04) used to supply the USB PHY of the STM32MP257
– Value: 3.3 V
• VPP_DDR (LDO5) used to supply the DDR4 VPP
– Value: 2.5 V
• FREE (LDO6) not used
– Value: None
• VDD_SDCARD (LDO7) used to supply the microSD
– Value: 3.3 V
• VDDIO_SDCARD (LDO8) used to supply the I/O of the microSD
– Value: 3.3 V or 1.8 V
6.5.5 Other power supply
A dedicated LDO provides the 1V5_PCIE for the 1.5 V of the mini‑PCIE connector.
UM3359 - Rev 2
Hardware layout and configuration
www.st.com
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card
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card
UM3359
website.
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