Rainbow Electronics ATtiny26L - Manual (Page 23)

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
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