ATXMEGA128B3-AU ATMEL [ATMEL Corporation], ATXMEGA128B3-AU Datasheet - Page 82
ATXMEGA128B3-AU
Manufacturer Part Number
ATXMEGA128B3-AU
Description
8/16-bit Atmel XMEGA B3 Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATXMEGA128B3-AU.pdf
(137 pages)
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Table 36-26. External Clock with prescaler
Notes:
36.14.7
Table 36-27. External 16MHz crystal oscillator and XOSC characteristics.
8074B–AVR–02/12
Symbol
Symbol
1/t
Δt
t
t
t
t
t
CH
CR
CK
CL
CF
CK
CK
1. System Clock Prescalers must be set so that maximum CPU clock frequency for device is not exceeded.
2. The maximum frequency vs. supply voltage is linear between 1.8V and 2.7V, and the same applies for all other parameters
External 16MHz crystal oscillator and XOSC characteristics
with supply voltage conditions
Parameter
Cycle to cycle jitter
Long term jitter
Frequency error
Duty cycle
Parameter
Clock Frequency
Clock Period
Clock High Time
Clock Low Time
Rise Time (for maximum frequency)
Fall Time (for maximum frequency)
Change in period from one clock cycle to the next
(2)
Condition
(1)
XOSCPWR=0, FRQRANGE=1, 2, or 3
XOSCPWR=0, FRQRANGE=1, 2, or 3
XOSCPWR=0, FRQRANGE=2 or 3
XOSCPWR=0, FRQRANGE=2 or 3
for System Clock
XOSCPWR=0, FRQRANGE=0
XOSCPWR=0, FRQRANGE=0
XOSCPWR=0, FRQRANGE=0
XOSCPWR=0, FRQRANGE=1
XOSCPWR=0, FRQRANGE=0
XOSCPWR=0, FRQRANGE=1
XOSCPWR=1
XOSCPWR=1
XOSCPWR=1
XOSCPWR=1
Condition
V
V
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
CC
CC
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
Min
4.5
2.4
4.5
2.4
11
0
0
7
Min.
Typ
Typ.
0.03
0.03
0.03
0.03
50
50
50
50
0
0
0
0
0
0
XMEGA B3
Max
142
1.5
1.5
90
10
Max.
Units
MHz
Units
ns
%
ns
%
82
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