About YZhan.3

YZhan.3 · 2020-07-16

I used STPMIC1APQR to power STM32MP151AAC3. At present, the BSTOUT of STPMIC1 has an output voltage of 5.2V, and BSTOUT is short-circuited to SWIN, but when the internal switches pwr_sw and pwr_usb_sw of the STPMIC1 are turned on, SWOUT and VBUSOTG a...

YZhan.3 · 2020-07-15

First briefly introduce our motherboard. STM32MPU151AAC3 (361-pin TFBGA package) is used in our motherboard, and STPMIC1APQR is used in the power supply. At present, booting from Micro-SD card is normal, DDR3L and e.MMC are working normally. Issue : ...

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The SWOUT and VBUS_OTG of STPMIC1 have no output

The BSTOUT pin of STPMIC1APQR already has a 5.2V voltage output, and the SWIN pin is directly connected to the BSTOUT pin, but SWOUT has no voltage output. what error will cause this problem?