Rainbow-electronics ATtiny28L Manuale Utente Scaricare il pdf (Pagina 16)

ATtiny28L/V

1062E–10/01

Figure 16. MCU Start-up, RESET Tied to VCC.

Figure 17. 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 50 ns will generate a reset, even if the clock is not running. Shorter pulses are not

guaranteed to generate a reset. When the applied voltage 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 18. 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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Rainbow-electronics ATtiny28L Manuale Utente Pagina 16