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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STMPE2403 датащи(PDF) 58 Page - STMicroelectronics |
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STMPE2403 датащи(HTML) 58 Page - STMicroelectronics |
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58 / 63 page  Miscellaneous features STMPE2403 58/63 14 Miscellaneous features 14.1 Reset STMPE2403 is equipped with an internal POR circuit that holds the device in reset state, until the clock is steady and VCC input is valid. Host system may choose to reset the STMPE2403 by asserting Reset_N pin. 14.2 Under Voltage Lockout STMPE2403 is equipped with an internal UVLO circuit that generates a RESET signal, when the main supply voltage falls below the allowed threshold. 14.3 Clock output STMPE2403 provides a buffered 32KHz clock output at one of the GPIO as alternate function. This clock could be used for cascading of multiple port expander devices, using just 1 XTAL unit. 14.4 Crystal oscillator STMPE2403 provides the option to use a crystal oscillator to provide the 32KHz clock. Figure 14. Recommended schematics if external XTAL is used STMPE2403 XTALIN XTALOUT GND 32KHz 27pF 27pF |
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