atmega323l ATMEL Corporation, atmega323l Datasheet - Page 215

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

External Clock Drive
Waveforms
External Clock Drive
1457G–AVR–09/03
Figure 106. External Clock Drive Waveforms
Table 72. External Clock Drive
Table 73. External RC Oscillator, Typical Frequencies
Note:
Symbol
1/t
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
CLCL
R should be in the range 3k
given in the table includes pin capacitance. This will vary with package type.
lL1
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
R [k ]
31.5
100
6.5
lH1
V
- 100k , and C should be at least 20pF. The C values
Min
CC
250
100
100
0
= 2.7V to
C [pF]
70
20
20
Max
1.6
1.6
5.5
4
V
V
ATmega323(L)
CC
Min
125
50
50
0
= 4.0V to
Max
0.5
0.5
5.5
8
TBD
TBD
TBD
f
V
Units
MHz
ns
ns
ns
s
s
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