Datasheet

34
7799D–AVR–11/10
ATmega8U2/16U2/32U2
Notes: 1. The device is shipped with this option selected.
2. The frequency ranges are preliminary values. Actual values are TBD.
3. If 8 MHz frequency exceeds the specification of the device (depends on V
CC
), the CKDIV8
Fuse can be programmed in order to divide the internal frequency by 8.
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table 8-5 on page 31.
Note: 1. The device is shipped with this option selected.
Table 8-7. Start-up times for the internal calibrated RC Oscillator clock selection
Power Conditions
Start-up Time from Power-
down and Power-save
Additional Delay from
Reset (V
CC
= 5.0V) SUT1..0
BOD enabled 6 CK 14 CK 00
Fast rising power 6 CK 14 CK + 4.1 ms 01
Slowly rising power 6 CK 14 CK + 65 ms
(1)
10
Reserved 11