ATMEGA16-16AU SL602 Atmel, ATMEGA16-16AU SL602 Datasheet - Page 293

• Manufacturer Part Number: ATMEGA16-16AU SL602
• Manufacturer: Atmel

External Clock
Drive Waveforms
External Clock
Drive
2466T–AVR–07/10
5. Minimum V
5] The sum of all IOH, for ports D3 - D7, should not exceed 100 mA.
6] The sum of all IOH, for ports C0 - C7, should not exceed 100 mA.If IOH exceeds the test condition, VOH may exceed the
related specification. Pins are not guaranteed to source current greater than the listed test condition.
CC
for Power-down is 2.5V.
Figure 145. External Clock Drive Waveforms
Table 118. External Clock Drive
Note:
Table 119. External RC Oscillator, Typical Frequencies (V
Notes:
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
1. Refer to
1. R should be in the range 3 kΩ - 100 kΩ, and C should be at least 20 pF.
2. The frequency will vary with package type and board layout.
R [kΩ]
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from
one clock cycle to the
next
V
33
10
IL1
V
(1)
“External Clock” on page 31
IH1
(1)
V
CC
Min
125
50
50
0
= 2.7V to
C [pF]
for details.
22
22
Max
1.6
1.6
5.5
8
2
V
CC
V
62.5
Min
CC
25
25
0
= 5)
= 4.5V to
ATmega16(L)
Max
650 kHz
2.0 MHz
0.5
0.5
16
5.5
2
f
(2)
V
Units
MHz
μs
ns
%
293