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STC12LE5628 Datasheet(PDF) 49 Page - STCmicro Technology Co,.Ltd |
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STC12LE5628 Datasheet(HTML) 49 Page - STCmicro Technology Co,.Ltd |
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49 / 377 page  Besides the POR voltage, there is a higher threshold voltage: the Low Voltage Detection (LVD) voltage for STC12C5620AD series. When the VCC power drops down to the LVD voltage, the Low voltage Flag, LVDF bit (PCON.5), will be set by hardware. (Note that during power-up, this flag will also be set, and the user should clear it by software for the following Low Voltage detecting.) This flag can also generate an interrupt if the enable bit of LVD interrupt is set to 1. The threshold voltage of STC12C5620AD built-in low voltage detection reset is optional in STC-ISP Writer/ Programmer. The detection voltage of 5V MCU of STC12C5620AD series is optional between 3.7V and 3.3V as shown in following figure. 2.3.5 Internal Low Voltage Detection Reset The detection voltage of 3V MCU of STC12LE5620AD series is optional between 2.4V and 2.0V as shown in following figure. 49 |
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