关于407工作电压的问题

maxwell449 · 发表于 2016-9-20 15:08:32

用直流电压源供电，GPIO口复用推挽输出，当电压降到2V2时，GPIO口就不输出了，板子自动reset。请问大家407的最低工作电压是多少

augustedward · 发表于 2016-9-20 15:08:33

找FLASH_OB_BORConfig(uint8_t OB_BOR)这个函数

maxwell449 · 发表于 2016-9-20 15:12:14

自顶一下

augustedward · 发表于 2016-9-20 16:03:31

1.8 V to 3.6 V application supply and I/Os

augustedward · 发表于 2016-9-20 16:05:52

During power on, the Brownout reset (BOR) keeps the device under reset until the supply voltage reaches the specified VBOR threshold. VBOR is configured through device option bytes. By default, BOR is off. 4 programmable VBOR thresholds can be selected. ● BOR off (VBOR0): reset threshold level for 1.8 to 2.10 V voltage range ● BOR Level 1 (VBOR1): reset threshold level for 2.10 to 2.40 V voltage range ● BOR Level 2 (VBOR2): reset threshold level for 2.40 to 2.70 V voltage range ● BOR Level 3 (VBOR3): reset threshold level for 2.70 to 3.60 V voltage range When the supply voltage (VDD) drops below the selected VBOR threshold, a device reset is generated.