ATMEGA48V_09 ATMEL [ATMEL Corporation], ATMEGA48V_09 Datasheet - Page 305

• Manufacturer Part Number: ATMEGA48V_09
• Description: 8-bit Microcontroller with 8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

28.4
28.4.1
Table 28-1.
Notes:
28.4.2
28.4.3
2545R–AVR–07/09
Factory
Calibration
User
Calibration
Clock Characteristics
1. Voltage range for ATmega48V/88V/168V.
2. Voltage range for ATmega48/88/168.
Calibrated Internal RC Oscillator Accuracy
External Clock Drive Waveforms
External Clock Drive
Calibration Accuracy of Internal RC Oscillator
Figure 28-3. External Clock Drive Waveforms
Table 28-2.
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
7.3 - 8.1 MHz
Frequency
8.0 MHz
Parameter
Oscillator
Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period
from one clock
cycle to the next
V
External Clock Drive
IL1
V
IH1
1.8V - 5.5V
2.7V - 5.5V
V
3V
Min.
CC
250
100
100
V
0
CC
=1.8-5.5V
(1)
(2)
Max.
2.0
2.0
4
2
Min.
Temperature
100
-40°C - 85°C
V
40
40
0
CC
25°C
=2.7-5.5V
Max.
ATmega48/88/168
1.6
1.6
10
2
Min.
V
50
20
20
0
Calibration Accuracy
CC
=4.5-5.5V
Max.
±10%
±1%
0.5
0.5
20
2
Units
MHz
ns
ns
ns
μs
μs
%
305