參數資料
型號: EFM32LG842F128
廠商: Energy Micro
文件頁數: 17/68頁
文件大?。?/td> 0K
描述: IC MCU 32BIT 128KB FLASH QFP64
標準包裝: 1,000
系列: Leopard Gecko
核心處理器: ARM? Cortex?-M4
芯體尺寸: 32-位
速度: 48MHz
連通性: I²C,IrDA,智能卡,SPI,UART/USART
外圍設備: 欠壓檢測/復位,DMA,LCD,POR,PWM,WDT
輸入/輸出數: 53
程序存儲器容量: 128KB(128K x 8)
程序存儲器類型: 閃存
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 1.85 V ~ 3.8 V
數據轉換器: A/D 8x12b,D/A 2x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-TQFP
包裝: 帶卷 (TR)
Preliminary
...the world's most energy friendly microcontrollers
2013-06-28 - EFM32LG842FXX - d0116_Rev1.10
24
www.energymicro.com
3.9.4 HFRCO
Table 3.12. HFRCO
Symbol
Parameter
Condition
Min
Typ
Max
Unit
28 MHz frequency band
28
MHz
21 MHz frequency band
21
MHz
14 MHz frequency band
14
MHz
11 MHz frequency band
11
MHz
7 MHz frequency band
6.6
1
MHz
fHFRCO
Oscillation frequency, VDD=
3.0 V, TAMB=25°C
1 MHz frequency band
1.2
2
MHz
tHFRCO_settling
Settling time after start-up
fHFRCO = 14 MHz
0.6
Cycles
fHFRCO = 28 MHz
106
A
fHFRCO = 21 MHz
93
A
fHFRCO = 14 MHz
77
A
fHFRCO = 11 MHz
72
A
fHFRCO = 6.6 MHz
63
A
IHFRCO
Current consumption
fHFRCO = 1.2 MHz
22
A
DCHFRCO
Duty cycle
fHFRCO = 14 MHz
48.5
50
51
%
TUNESTEPH-
FRCO
Frequency step for LSB
change in TUNING value
0.3
%
17 MHz for devices with prod. rev. < 19.
21 MHz for devices with prod. rev. < 19.
Figure 3.8. Calibrated HFRCO 11 MHz Band Frequency vs Temperature and Supply Voltage
1.8
2.2
2.6
3.0
3.4
3.8
Vdd [ V]
10.80
10.85
10.90
10.95
11.00
11.05
11.10
11.15
F
re
q
u
e
n
c
y
[M
H
z
]
-40° C
25° C
85° C
–40
–15
5
25
45
65
85
Tem perat ure [ ° C]
10.80
10.85
10.90
10.95
11.00
11.05
11.10
11.15
11.20
F
re
q
u
e
n
c
y
[M
H
z
]
1.8 V
3 V
3.8 V
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