參數資料
型號: STM32F103R8T7TR
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 1.25 MHz, RISC MICROCONTROLLER, PQFP64
封裝: 10 X 10 MM, ROHS COMPLIANT, QFP-64
文件頁數: 43/92頁
文件大?。?/td> 1212K
代理商: STM32F103R8T7TR
Electrical characteristics
STM32F103x8, STM32F103xB
Doc ID 13587 Rev 11
5.3.6
External clock source characteristics
High-speed external user clock generated from an external source
The characteristics given in Table 20 result from tests performed using an high-speed
external clock source, and under ambient temperature and supply voltage conditions
summarized in Table 9.
Low-speed external user clock generated from an external source
The characteristics given in Table 21 result from tests performed using an low-speed
external clock source, and under ambient temperature and supply voltage conditions
summarized in Table 9.
Table 20.
High-speed external user clock characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fHSE_ext
User external clock source
frequency(1)
18
25
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.
16
ns
tr(HSE)
tf(HSE)
OSC_IN rise or fall time(1)
20
Cin(HSE)
OSC_IN input capacitance(1)
5pF
DuCy(HSE) Duty cycle
45
55
%
IL
OSC_IN Input leakage current
VSS VIN VDD
±1
A
Table 21.
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)
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)
5pF
DuCy(LSE) Duty cycle
30
70
%
IL
OSC32_IN Input leakage
current
VSS VIN VDD
±1
A
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