參數(shù)資料
型號(hào): MD83C154XXX-20P883D
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CDIP40
封裝: 0.600 INCH, CERAMIC, DIP-40
文件頁數(shù): 127/142頁
文件大?。?/td> 61013K
代理商: MD83C154XXX-20P883D
85
XMEGA B3 [DATASHEET]
8074D–AVR–08/2013
Table 36-26. External clock with prescaler(1) for system clock
Notes:
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 with supply voltage conditions
36.14.7 External 16MHz crystal oscillator and XOSC characteristics
Table 36-27. External 16MHz crystal oscillator and XOSC characteristics.
Symbol
Parameter
Condition
Min
Typ
Max
Units
1/t
CK
Clock Frequency(2)
VCC = 1.6 - 1.8V
0
90
MHz
V
CC = 2.7 - 3.6V
0
142
tCK
Clock Period
V
CC = 1.6 - 1.8V
11
ns
VCC = 2.7 - 3.6V
7
tCH
Clock High Time
VCC = 1.6 - 1.8V
4.5
ns
V
CC = 2.7 - 3.6V
2.4
t
CL
Clock Low Time
VCC = 1.6 - 1.8V
4.5
ns
VCC = 2.7 - 3.6V
2.4
tCR
Rise Time (for maximum frequency)
V
CC = 1.6 - 1.8V
1.5
ns
VCC = 2.7 - 3.6V
1.0
tCF
Fall Time (for maximum frequency)
VCC = 1.6 - 1.8V
1.5
ns
V
CC = 2.7 - 3.6V
1.0
t
CK
Change in period from one clock cycle to the next
10
%
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Cycle to cycle jitter
XOSCPWR=0, FRQRANGE=0
0
ns
XOSCPWR=0, FRQRANGE=1, 2, or 3
0
XOSCPWR=1
0
Long term jitter
XOSCPWR=0, FRQRANGE=0
0
ns
XOSCPWR=0, FRQRANGE=1, 2, or 3
0
XOSCPWR=1
0
Frequency error
XOSCPWR=0, FRQRANGE=0
0.03
%
XOSCPWR=0, FRQRANGE=1
0.03
XOSCPWR=0, FRQRANGE=2 or 3
0.03
XOSCPWR=1
0.03
Duty cycle
XOSCPWR=0, FRQRANGE=0
50
%
XOSCPWR=0, FRQRANGE=1
50
XOSCPWR=0, FRQRANGE=2 or 3
50
XOSCPWR=1
50
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