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STMPE2403 データシート(PDF) 58 Page - STMicroelectronics

部品番号 STMPE2403
部品情報  24-bit Enhanced port expander with Keypad and PWM controller Xpander logic
PDF  63 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE2403 データシート(HTML) 58 Page - STMicroelectronics

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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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