Rainbow-electronics ATmega162V Manuel d'utilisateur télécharger pdf (Page 48)

100

101

ATmega162/V

2513E–AVR–09/03

Figure 22. MCU Start-up, RESET Tied to V

Figure 23. 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 the minimum pulse width (see Table 18) 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

counter starts the MCU after the Time-out period t

TOUT

has expired.

Figure 24. External Reset During Operation

RESET

TIME-OUT

INTERNAL

RESET

TOUT

POT

RST

RESET

TIME-OUT

INTERNAL

RESET

TOUT

POT

RST

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 322 323

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Rainbow-electronics ATmega162V Manuel d'utilisateur Page 48

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