ATA5771_09 ATMEL [ATMEL Corporation], ATA5771_09 Datasheet - Page 234

• Manufacturer Part Number: ATA5771_09
• Description: Microcontroller with UHF ASK/FSK Transmitter
• Manufacturer: ATMEL [ATMEL Corporation]

22.3
22.3.1
Table 22-2.
22.3.2
Figure 22-2. External Clock Drive Waveforms
22.3.3
Table 22-3.
7701C–AVR–12/08
Factory
Calibration
User Calibration
Oscillator Jitter
Symbol
1/t
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
Clock Characterizations
Calibrated Internal RC Oscillator Accuracy
External Clock Drive Waveforms
External Clock Drive
Parameter
Clock Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from one clock cycle to the next
Calibration Accuracy of Internal RC Oscillator
External Clock Drive
Note:
Example: with Oscillator divided by 32, jitter standard deviation will be 32 x 0.4 ns = 12.8 ns.
V
7.3 - 8.1 MHz
Frequency
IL1
8.0 MHz
8.0 MHz
V
1. The overall jitter increase proportionally to the divider ratio
IH1
2.7V - 5.5V
2.7V - 5.5V
V
3V
CC
Min.
100
V
40
40
0
CC
= 2.7 - 5.5V
Max.
-40 C - 125 C
1.6
1.6
Temperature
10
-40 C - 125
2
25 C
Min.
V
50
20
20
0
CC
= 4.5 - 5.5V
ATtiny24/44/84
Standard Deviation 0.4 ns
Max.
0.5
0.5
20
2
Accuracy
±20%
±2%
Units
MHz
ns
ns
ns
%
s
s
(1)
181