參數(shù)資料
型號: EFM32G290F64
廠商: Energy Micro
文件頁數(shù): 20/69頁
文件大小: 0K
描述: MCU 32BIT 64KB FLASH 112-BGA
標準包裝: 1,000
系列: Gecko
核心處理器: ARM? Cortex?-M3
芯體尺寸: 32-位
速度: 32MHz
連通性: EBI/EMI,I²C,IrDA,智能卡,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復位,DMA,POR,PWM,WDT
輸入/輸出數(shù): 90
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 閃存
RAM 容量: 16K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.8 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x12b,D/A 2x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 112-LFBGA
包裝: 帶卷 (TR)
其它名稱: EFM32G290F64-BGA112
...the world's most energy friendly microcontrollers
2013-06-28 - EFM32G290FXX - d0007_Rev1.60
27
www.energymicro.com
3.9 Oscillators
3.9.1 LFXO
Table 3.9. LFXO
Symbol
Parameter
Condition
Min
Typ
Max
Unit
fLFXO
Supported nominal crystal
frequency
32.768
kHz
ESRLFXO
Supported crystal equiv-
alent series resistance
(ESR)
30
120
kOhm
CLFXOL
Supported crystal external
load range
X
1
25
pF
DCLFXO
Duty cycle
48
50
53.5
%
ILFXO
Current consumption for
core and buffer after start-
up.
ESR=30 kOhm, CL=10 pF,
LFXOBOOST in CMU_CTRL
is 1
190
nA
tLFXO
Start- up time.
ESR=30 kOhm, CL=10 pF,
40% - 60% duty cycle has
been reached, LFXOBOOST
in CMU_CTRL is 1
400
ms
1See Minimum Load Capacitance (C
LFXOL) Requirement For Safe Crystal Startup in energyAware Designer in Simplicity Studio
For safe startup of a given crystal, the energyAware Designer in Simplicity Studio contains a tool to help
users configure both load capacitance and software settings for using the LFXO. For details regarding
the crystal configuration, the reader is referred to application note "AN0016 EFM32 Oscillator Design
Consideration".
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