参数资料
型号: STM32F205RET6TR
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 120 MHz, RISC MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, ROHS COMPLIANT, LQFP-64
文件页数: 137/163页
文件大小: 2275K
代理商: STM32F205RET6TR
STM32F205xx, STM32F207xx
Electrical characteristics
Doc ID 15818 Rev 7
5.3.8
External clock source characteristics
High-speed external user clock generated from an external source
The characteristics given in Table 23 result from tests performed using an high-speed
external clock source, and under ambient temperature and supply voltage conditions
summarized in Table 10.
Low-speed external user clock generated from an external source
The characteristics given in Table 24 result from tests performed using an low-speed
external clock source, and under ambient temperature and supply voltage conditions
summarized in Table 10.
Table 23.
High-speed external user clock characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fHSE_ext
External user clock source
frequency(1)
18
26
MHz
VHSEH
OSC_IN input pin high level voltage
0.7VDD
-VDD
V
VHSEL
OSC_IN input pin low level voltage
VSS
-0.3VDD
tw(HSE)
OSC_IN high or low time(1)
1.
Guaranteed by design, not tested in production.
5-
-
ns
tr(HSE)
tf(HSE)
OSC_IN rise or fall time(1)
--
20
Cin(HSE)
OSC_IN input capacitance(1)
-5
-
pF
DuCy(HSE) Duty cycle
45
-
55
%
IL
OSC_IN Input leakage current
VSS ≤ VIN ≤ VDD
--
±1
A
Table 24.
Low-speed external user clock characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fLSE_ext
User External clock source
frequency(1)
1.
Guaranteed by design, not tested in production.
-
32.768
1000
kHz
VLSEH
OSC32_IN input pin high level
voltage
0.7VDD
-VDD
V
VLSEL
OSC32_IN input pin low level
voltage
VSS
-0.3VDD
tw(LSE)
tf(LSE)
OSC32_IN high or low time(1)
450
-
ns
tr(LSE)
tf(LSE)
OSC32_IN rise or fall time(1)
--
50
Cin(LSE)
OSC32_IN input capacitance(1)
-5
-
pF
DuCy(LSE) Duty cycle
30
-
70
%
IL
OSC32_IN Input leakage current
VSS ≤ VIN ≤ VDD
--
±1
A
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