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HT48R05A Datasheet(PDF) 5 Page - Holtek Semiconductor Inc |
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HT48R05A Datasheet(HTML) 5 Page - Holtek Semiconductor Inc |
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5 / 44 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 4000 kHz fTIMER Timer I/P Frequency (TMR) 3.3V ¾ 0 ¾ 4000 kHz 5V ¾ 0 ¾ 4000 kHz tWDTOSC Watchdog Oscillator 3.3V ¾ 43 86 168 ms 5V ¾ 35 65 130 ms tWDT1 Watchdog time-out Period (RC) 3.3V Without WDT prescaler 11 22 43 ms 5V 9 17 35 ms tWDT2 Watchdog Time-out Period (System Clock) ¾ Without WDT prescaler ¾ 1024 ¾ tSYS tRES External Reset Low Pulse Width ¾¾ 1 ¾¾ ms tSST System Start-up Timer Period ¾ Power-up, reset or wake-up from Halt ¾ 1024 ¾ tSYS tINT Interrupt Pulse Width ¾¾ 1 ¾¾ ms HT48R05A-1 5 February 25, 2000 Preliminary |
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