Datasheet

23
ATtiny2313/V
2543H–AVR–02/05
Figure 12. Crystal Oscillator Connections
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.
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.
Table 4. Crystal Oscillator Operating Modes
CKSEL3..1 Frequency Range
(1)
(MHz)
Recommended Range for Capacitors C1
and C2 for Use with Crystals (pF)
100
(2)
0.4 - 0.9 –
101 0.9 - 3.0 12 - 22
110 3.0 - 8.0 12 - 22
111 8.0 - 12 - 22
XTAL2
XTAL1
GND
C2
C1