参数资料
型号: M306K9F8LRP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP144
封装: 16 X 16 MM, 0.40 MM PITCH, PLASTIC, TQFP-144
文件页数: 85/101页
文件大小: 2590K
代理商: M306K9F8LRP
84
XMEGA A3U [DATASHEET]
Atmel-8386D-AVR-ATxmega64A3U-128A3U-192A3U-256A3U–03/2014
36.1.14.8 External 32.768kHz crystal oscillator and TOSC characteristics
Table 36-30. External 32.768kHz crystal oscillator and TOSC characteristics.
Note:
1.
See Figure 36-4 for definition.
Figure 36-4. TOSC input capacitance.
The parasitic capacitance between the TOSC pins is CL1 + CL2 in series as seen from the crystal when oscillating without
external capacitors.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
ESR/R1
Recommended crystal equivalent
series resistance (ESR)
Crystal load capacitance 6.5pF
60
k
Crystal load capacitance 9.0pF
35
CTOSC1
Parasitic capacitance TOSC1 pin
4.2
pF
CTOSC2
Parasitic capacitance TOSC2 pin
4.3
pF
Recommended safety factor
capacitance load matched to
crystal specification
3
CL1
CL2
2
C
S
O
T
1
C
S
O
T
Device internal
External
32.768kHz crystal
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