参数资料
型号: STM8AF52A8TAY
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: 93/120页
文件大小: 2236K
代理商: STM8AF52A8TAY
Electrical characteristics
STM8AF52/62xx, STM8AF51/61xx
Doc ID 14395 Rev 7
10.3.3
External clock sources and timing characteristics
HSE external clock
An HSE clock can be generated by feeding an external clock signal of up to 24 MHz to the
OSCIN pin.
Clock characteristics are subject to general operating conditions for VDD and TA.
Figure 20.
HSE external clock source
HSE crystal/ceramic resonator oscillator
The HSE clock can be supplied using a crystal/ceramic resonator oscillator of up to 24 MHz.
All the information given in this paragraph is based on characterization results with specified
typical external components. In the application, the resonator and the load capacitors have
to be placed as close as possible to the oscillator pins in order to minimize output distortion
and startup stabilization time. Refer to the crystal resonator manufacturer for more details
(frequency, package, accuracy...).
Table 47.
HSE external clock characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fHSE_ext
User external clock source
frequency
TA = -40 °C to 150 °C
0(1)
—24(2)
MHz
VHSEdHL
Comparator hysteresis
0.1 x VDD
——
V
VHSEH
OSCIN high-level input pin
voltage
0.7 x VDD
—VDD
VHSEL
OSCIN low-level input pin
voltage
—VSS
0.3 x VDD
ILEAK_HSE OSCIN input leakage current
VSS < VIN < VDD
-1
+1
A
1.
If CSS is used, the external clock must have a frequency above 500 kHz.
2.
For devices with less than 96 Kbyte of program memory, the 24 MHz are only achievable using the super set silicon
(salestype contains SSS)
OSCIN
fHSE
External clock
STM8A
source
VHSEL
VHSEH
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