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参数资料
| 型号： | STM8AH5168TAX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP48 |
| 封装： | 7 X 7 MM, ROHS COMPLIANT, LQFP-48 |
| 文件页数： | 87/112页 |
| 文件大小： | 2161K |
| 代理商： | STM8AH5168TAX |
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Electrical characteristics
STM8AF61xx, STM8AH61xx, STM8AF51xx, STM8AH51xx
Doc ID 14395 Rev 5
Figure 20. HSE oscillator circuit diagram
HSE oscillator critical gm formula
The crystal characteristics have to be checked with the following formula:
Equation 1
where gmcrit can be calculated with the crystal parameters as follows:
Equation 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
Table 45.
HSE oscillator characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
RF
Feedback resistor
—
220
—
k
Ω
CL1/CL2
(1)
Recommended load capacitance
—
20
pF
gm
Oscillator transconductance
—
5
—
mA/V
tSU(HSE)
(2)
Startup time
VDD is
stabilized
—2.8
—
ms
1.
The oscillator needs two load capacitors, CL1 and CL2, to act as load for the crystal. The total load capacitance (Cload) is
(CL1 * CL2)/(CL1 + CL2). If CL1 = CL2, Cload = CL1/2. Some oscillators have built-in load capacitors, CL1 and CL2.
2.
This value is the startup time, measured from the moment it is enabled (by software) until a stabilized 24 MHz oscillation is
reached. It can vary with the crystal type that is used.
OSCOUT
OSCIN
fHSE to core
CL1
CL2
RF
STM8A
Resonator
Current control
gm
Rm
Cm
Lm
CO
Resonator
g
m
g
mcrit
g
mcrit
2
Π
×
HSE
f
×
()
2
R
m
×
2Co
C
+
()
2
=
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相关代理商/技术参数 |
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| STM8AH51XX | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Automotive 8-bit MCU, with up to 128 Kbytes Flash, EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 V to 5.5 V |
| STM8AH5X23TAY | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Automotive 8-bit MCU, with up to 128 Kbytes Flash, EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 V to 5.5 V |
| STM8AH5X26TAY | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Automotive 8-bit MCU, with up to 128 Kbytes Flash, EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 V to 5.5 V |
| STM8AH5X27TAY | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Automotive 8-bit MCU, with up to 128 Kbytes Flash, EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 V to 5.5 V |
| STM8AH5X2ATAY | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Automotive 8-bit MCU, with up to 128 Kbytes Flash, EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 V to 5.5 V |
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