参数资料
型号: TSC80C31-20CHR
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 20 MHz, MICROCONTROLLER, CQCC44
封装: LCC-44
文件页数: 129/143页
文件大小: 4602K
代理商: TSC80C31-20CHR
86
XMEGA A3BU [DATASHEET]
8362F–AVR–02/2013
37.15.8 External 32.768kHz crystal oscillator and TOSC characteristics
Table 37-31. External 32.768kHz crystal oscillator and TOSC characteristics.
Note:
1.
See Figure 37-4 for definition.
Figure 37-4. 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
3.0
pF
CTOSC2
Parasitic capacitance TOSC2 pin
2.9
CL
Parasitic capacitance load
2.0
Recommended safety factor
capacitance load matched to
crystal specification
3.0
CL1
CL2
2
C
S
O
T
1
C
S
O
T
Device internal
External
32.768kHz crystal
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