ATMEGA48V_11 ATMEL [ATMEL Corporation], ATMEGA48V_11 Datasheet - Page 306

• Manufacturer Part Number: ATMEGA48V_11
• Description: 8-bit Atmel Microcontroller with 4/8/16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

29.4
29.4.1
Table 29-1.
Notes:
29.4.2
29.4.3
2545T–AVR–05/11
Factory calibration
User calibration
Clock characteristics
1. Voltage range for Atmel ATmega48V/88V/168V.
2. Voltage range for Atmel ATmega48/88/168.
Calibrated internal RC oscillator accuracy
External clock drive waveforms
External clock drive
Calibration accuracy of internal RC oscillator.
Figure 29-3. External clock drive waveforms.
Table 29-2.
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
7.3MHz - 8.1MHz
t
CLCL
CLCL
Frequency
8.0MHz
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
V
3V
Min.
CC
CC
250
100
100
0
= 1.8V - 5.5V
(1)
(2)
Max.
2.0
2.0
4
2
V
Min.
CC
Temperature
100
-40°C - 85°C
40
40
0
= 2.7V - 5.5V
25°C
Max.
ATmega48/88/168
1.6
1.6
10
2
V
Min.
CC
50
20
20
0
Calibration accuracy
= 4.5V - 5.5V
Max.
±10%
±1%
0.5
0.5
20
2
Units
MHz
ns
μs
%
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