stm8af6166t STMicroelectronics, stm8af6166t Datasheet - Page 57

• Manufacturer Part Number: stm8af6166t
• Description: 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
• Manufacturer: STMicroelectronics

STM8AF61xx, STM8AF51xx
Figure 10. External clock source
HSE crystal/ceramic resonator oscillator
The HSE clock oscillator can be supplied with a 1-24 MHz crystal/ceramic resonator
oscillator.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 start-up stabilization time. Refer to the crystal resonator manufacturer
for more details (frequency, package, accuracy...).
Table 24.
1. C
2. The oscillator selection can be optimized in terms of supply current using a high quality resonator with
3.
t
SU(HSE)
Symbol
I
DD(HSE)
C
small R
oscillation is reached. This value is measured for a standard crystal resonator and it can vary significantly
with the crystal manufacturerg
t
R
g
SU(HSE)
L1
L
i
2
m
F
(1)
and C
(3)
S
V
V
value for example MSIV-TIN32.768kHz. Refer to crystal manufacturer for more details
is the start-up time measured from the moment it is enabled (by software) to a stabilized 24 MHz
HSEH
HSEL
Feedback resistor
Recommended load capacitance versus
equivalent serial resistance of the crystal (R
HSE driving current
Oscillator transconductance
Startup time
HSE oscillator power consumption
L2
HSE oscillator characteristics
External clock
are approximately equivalent to 2 C
source
mcrit
Parameter
OSC_IN
L
S
)
(2)
R
M
Conditions
V
V
stabilized
DD
= 30 Ω (typ)
f
IN
HSE
V
= 5.0 V
SS
STM8
= V
Electrical characteristics
is
SS
1 (stabilized)
3 (startup)
Typ
220
500
3.5
30
1
mA/V
Unit
57/84
mA
ms
kΩ
pF
µA