Rainbow Electronics ATtiny28L - Manual (Page 16)

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
t
TOUT
V
POT
V
RST
VCC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
VCC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
RST