ATtiny2313/V
Figure 12. Crystal Oscillator Connections
C2
XTAL2
XTAL1
GND
C1
The Oscillator can operate in three different modes, each optimized for a specific fre-
quency range. The operating mode is selected by the fuses CKSEL3..1 as shown in
Table 4.
Table 4. Crystal Oscillator Operating Modes
Recommended Range for Capacitors C1
CKSEL3..1
100(2)
101
Frequency Range(1) (MHz)
and C2 for Use with Crystals (pF)
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
8.0 -
–
12 - 22
12 - 22
12 - 22
110
111
Notes: 1. The frequency ranges are preliminary values. Actual values are TBD.
2. This option should not be used with crystals, only with ceramic resonators.
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown
in Table 5.
23
2543F–AVR–08/04
ATMEL [ ATMEL ]
