Rainbow Electronics ATtiny28L - Manual (Page 5)

5
ATtiny28L/V
1062E–10/01
External Clock To drive the device from an external clock source, XTAL2 should be left unconnected
while XTAL1 is driven as shown in Figure 3.
Figure 3. External Clock Drive Configuration
External RC Oscillator For timing insensitive applications, the external RC configuration shown in Figure 4 can
be used. For details on how to choose R and C, see Table 25 on page 54.
Figure 4. External RC Configuration
XTAL2
XTAL1
GND
NC
EXTERNAL
OSCILLATOR
SIGNAL
XTAL2
XTAL1
GND
NC
C
R
V
CC