Rainbow-electronics ATmega163L Manual de usuario descargar pdf (Pagina 24)

ATmega163(L)

24

Figure 25. MCU Start-up, RESET

Tied to VCC.

Figure 26. MCU Start-up, RESET

Extended 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 27. External Reset During Operation

VCC

RESET

TIME-OUT

INTERNAL

RESET

t

TOUT

V

POT

V

RST

VCC

RESET

TIME-OUT

INTERNAL

RESET

t

TOUT

V

POT

V

RST

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