the Reset Time-out. For more information on the pre-programmed calibration value, see the sec-
tion “Calibration Byte” on page 371
Table 6-7.
Internal Calibrated RC Oscillator Operating Modes(1)(3)
Frequency Range(2) (MHz)
CKSEL3..0
0010
7.3 - 8.1
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 VCC), 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 6-5 on page 43.
44
AT90USB64/128
7593A–AVR–02/06
ATMEL [ ATMEL ]
