HT48R50 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT48R50

8-Bit Microcontroller Series

Holtek Semiconductor 

HT48CXX/HT48RXX

A.C. Characteristics

Symbol

Parameter

Test Conditions

VDD Conditions

3V

—

fSYS1

System Clock (Crystal OSC)

5V

—

3V

—

fSYS2

System Clock (RC OSC)

5V

—

fTIMER

Timer I/P Frequency

(TMR, TMR0, TMR1)

3V

5V

—

—

tWDTOSC Watchdog Oscillator

—

—

tWDT1

tWDT2

tRES

Watchdog Time-out

Period (RC)

Watchdog Time-out Period

(System Clock)

External Reset Low Pulse

Width

tSST

System Start-up Timer

Period

tINT

Interrupt Pulse Width

Note: tSYS=1/fSYS

—

Without WDT

prescaler

—

Without WDT

prescaler

—

—

Power-up or

— Wake-up from

halt

—

—

Ta=25°C

Min. Typ. Max. Unit

400 — 4000 kHz

400 — 8000 kHz

400 — 2000 kHz

400 — 3000 kHz

0

— 4000 kHz

0

— 4000 kHz

45 90 180

µs

35 65 130

12 23 45

ms

9

17 35

— 1024 — tSYS

1

—

—

µs

— 1024 — tSYS

1

—

—

µs

12

25th May ’99

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