Rainbow-electronics ATtiny26L Manual do Utilizador descarregar pdf (Página 23)

ATtiny26(L)

1477B–AVR–04/02

Figure 21. MCU Start-up, RESET Tied to VCC

Figure 22. MCU Start-up, RESET Controlled Externally

External Reset An External Reset is generated by a low level on the RESET

pin. Reset pulses longer

than 500 ns will generate a reset, even if the clock is not running. Shorter pulses are not

guaranteed to generate a reset. When the applied signal reaches the Reset Threshold

Voltage – V

RST

– on its positive edge, the delay timer starts the MCU after the Time-out

period t

TOUT

has expired.

Figure 23. External Reset During Operation

VCC

RESET

TIME-OUT

INTERNAL

RESET

TOUT

POT

RST

VCC

RESET

TIME-OUT

INTERNAL

RESET

TOUT

POT

RST

VCC

RESET

TIME-OUT

INTERNAL

RESET

TOUT

RST

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