STM8S105C4B3 STMICROELECTRONICS [STMicroelectronics], STM8S105C4B3 Datasheet - Page 77
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STM8S105C4B3
Manufacturer Part Number
STM8S105C4B3
Description
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.STM8S105C4B3.pdf
(127 pages)
- Current page: 77 of 127
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STM8S105xx
Symbol
f
R
C
I
g
t
(1)
(2)
small R
(3)
HSE
DD(HSE)
SU(HSE)
m
F
(1)
The oscillator selection can be optimized in terms of supply current using a high quality resonator with
C is approximately equivalent to 2 x crystal Cload.
Data based on characterization results, not tested in production.
m
(4)
value. Refer to crystal manufacturer for more details
HSE crystal/ceramic resonator oscillator
The HSE clock can be supplied with a 1 to 16 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...).
Parameter
External high speed
oscillator frequency
Feedback resistor
Recommended load
capacitance
HSE oscillator power
consumption
Oscillator
transconductance
Startup time
V
V HSEL
HSEH
(2)
External clock
source
Table 33: HSE oscillator characteristics
Figure 19: HSE external clocksource
Conditions
C = 20 pF,
f
C = 10 pF,
f
V
OSC
OSC
DD
DocID14771 Rev 9
OSCIN
is stabilized
= 16 MHz
=16 MHz
Min
1
5
Typ
220
1
Max
16
20
6 (startup)
1.6 (stabilized)
6 (startup)
1.2 (stabilized)
f HSE
Electrical characteristics
STM8
(3)
(3)
Unit
MHz
kΩ
pF
mA
mA/V
ms
77/127
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