Datasheet

2466T–AVR–07/10

ATmega16(L)

choosing capacitors for use with crystals are given in Table 4. For ceramic resonators, the

capacitor values given by the manufacturer should be used.

Figure 12. Crystal Oscillator Connections

The Oscillator can operate in three different modes, each optimized for a specific frequency

range. The operating mode is selected by the fuses CKSEL3..1 as shown in Table 4.

Note: 1. This option should not be used with crystals, only with ceramic resonators.

Table 4. Crystal Oscillator Operating Modes

CKOPT CKSEL3..1

Frequency Range

(MHz)

Recommended Range for Capacitors

C1 and C2 for Use with Crystals (pF)

1 101

(1)

0.4 - 0.9 –

1 110 0.9 - 3.0 12 - 22

1 111 3.0 - 8.0 12 - 22

0 101, 110, 111 1.0 ≤ 12 - 22

XTAL2

XTAL1

GND