Rainbow Electronics ATmega64L - Manual (Page 29)

29
ATmega16(L)
2466B–09/01
When this clock source is selected, start-up times are determined by the SUT fuses as
shown in Table 12.
Timer/Counter Oscillator For AVR microcontrollers with Timer/Counter Oscillator pins (TOSC1 and TOSC2), the
crystal is connected directly between the pins. No external capacitors are needed. The
oscillator is optimized for use with a 32.768 kHz watch crystal. Applying an external
clock source to TOSC1 is not recommended.
Table 12. Start-up Times for the External Clock Selection
SUT1..0
Start-up Time from
Power-down and
Power-save
Additional Delay
from Reset
(V
CC
= 5.0V) Recommended Usage
00 6 CK – BOD enabled
01 6 CK 4 ms Fast rising power
10 6 CK 64 ms Slowly rising power
11 Reserved