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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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HT48R50A Scheda tecnica(PDF) 7 Page - Holtek Semiconductor Inc |
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HT48R50A Scheda tecnica(HTML) 7 Page - Holtek Semiconductor Inc |
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7 / 46 page  A.C. Characteristics Ta=25°C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions fSYS1 System Clock (Crystal OSC) 3.3V ¾ 400 ¾ 4000 kHz 5V ¾ 400 ¾ 8000 kHz fSYS2 System Clock (RC OSC) 3.3V ¾ 400 ¾ 4000 kHz 5V ¾ 400 ¾ 8000 kHz fSYS3 System Clock (Internal RC) 3.3V 3.2MHz option 1600 2500 3500 kHz 5V 2000 3200 4500 kHz fTIMER Timer I/P Frequency (TMR0/TMR1) 3.3V ¾ 0 ¾ 4000 kHz 5V ¾ 0 ¾ 8000 kHz tWDTOSC Watchdog Oscillator 3.3V ¾ 43 86 168 ms 5V ¾ 36 72 144 ms tWDT1 Watchdog Time-out Period (WDT OSC) 3.3V Without WDT prescaler 11 22 43 ms 5V 9 18 37 ms tWDT2 Watchdog Time-out Period (System Clock) ¾ Without WDT prescaler ¾ 1024 ¾ tSYS tWDT3 Watchdog Time-out Period (RTC OSC) ¾ Without WDT prescaler ¾ 7.812 ¾ ms tRES External Reset Low Pulse Width ¾¾ 1 ¾¾ ms tSST System Start-up Timer Period ¾ Wake-up from HALT ¾ 1024 ¾ tSYS tINT Interrupt Pulse Width ¾¾ 1 ¾¾ ms HT48R50A-1 Rev. 1.10 7 July 2, 2001 |
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