attiny11 ATMEL Corporation, attiny11 Datasheet - Page 61

• Manufacturer Part Number: attiny11
• Description: 8-bit Microcontroller With 1k Byte Flash
• Manufacturer: ATMEL Corporation

External Clock Drive
Waveforms
1006F–AVR–06/07
Figure 32. External Clock
External Clock Drive ATtiny11
External Clock Drive ATtiny12
Table 29. External RC Oscillator, Typical Frequencies
Note:
Symbol
1/t
Symbol
1/t
t
t
t
t
t
CHCX
t
CLCX
CLCH
CHCL
t
t
t
CLCL
t
CHCX
CLCX
CLCH
CHCL
CLCL
CLCL
CLCL
R should be in the range 3-100 kΩ, and C should be at least 20 pF. The C values given in
the table includes pin capacitance. This will vary with package type.
VIL1
R [kΩ]
31.5
100
6.5
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Parameter
Oscillator
Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
VIH1
V
Min
833
333
333
CC
0
= 1.8V to
2.7V
V
Min
500
200
200
C [pF]
CC
Max
0
1.2
1.6
1.6
70
20
20
= 2.7V to 4.0V
V
Min
250
100
100
CC
0
Max
1.6
1.6
2
= 2.7V to
4.0V
Max
1.6
1.6
4
V
Min
167
CC
67
67
0
= 4.0V to 5.5V
V
Min
125
ATtiny11/12
50
50
CC
0
100 kHz
1.0 MHz
4.0 MHz
= 4.0V to
5.5V
f
Max
0.5
0.5
Max
0.5
0.5
6
8
Units
Units
MHz
MHz
ns
ns
ns
µs
µs
ns
ns
ns
µs
µs
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