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STM8AF6268ITCU bảng dữ liệu(PDF) 59 Page - STMicroelectronics

tên linh kiện STM8AF6268ITCU
Giải thích chi tiết về linh kiện  Automotive 8-bit MCU, with up to 32 Kbyte Flash, data EEPROM, 10-bit ADC, timers, LIN, SPI, I2C, 3 to 5.5 V
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STM8AF6268ITCU bảng dữ liệu(HTML) 59 Page - STMicroelectronics

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DocID14952 Rev 11
59/99
STM8AF6246/48/66/68
Electrical characteristics
93
Figure 17. HSE oscillator circuit diagram
HSE oscillator critical gm formula
The crystal characteristics have to be checked with the following formula:
gm gmcrit
»
where gmcrit can be calculated with the crystal parameters as follows:
gmcrit
2
Π
×
HSE
f
×
()
2
Rm
×
2Co C
+
()
2
=
Rm: Notional resistance (see crystal specification)
Lm: Notional inductance (see crystal specification)
Cm: Notional capacitance (see crystal specification)
Co: Shunt capacitance (see crystal specification)
CL1 = CL2 = C: Grounded external capacitance
10.3.4
Internal clock sources and timing characteristics
Subject to general operating conditions for VDD and TA.
High speed internal RC oscillator (HSI)
Table 30. HSI oscillator characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fHSI
Frequency
-
-
16
-
MHz



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