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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SRC0 датащи(PDF) 19 Page - STMicroelectronics |
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SRC0 датащи(HTML) 19 Page - STMicroelectronics |
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19 / 48 page  DocID026008 Rev 2 19/48 SRC0 Waveforms 48 Figure 12. Unsuccessful power-up on SRC0 1. PB detection on falling edge. 2. Internal pull-down resistor 300 k is connected to PS HOLD input during power-up. 3. PSHOLD signal is ignored during tON_BLANK. When tON_BLANK expires, the level of the PSHOLD signal is not high therefore the EN signal goes low. Even releasing the PB button after the tON_BLANK will not prevent this. EN (3) (2) t ON_BLANK expires PSHOLD state detected as low EN deasserted intenal pull-down resistor connected to PS HOLD input t DEBOUNCE Push-button pressed and PB connected to GND Push-button pressed and PB connected to GND tREC PB (1) RST PSHOLD ignored PSHOLD AM00238v2 INT signal is held high during power-up (i.e. until tON_BLANK expires in the case of the STM6601). V CC is considered VCC > VTH+. Note: |
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