STM8S105K6U3C View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM8S105K6U3C

Access line, 16 MHz STM8S 8-bit MCU, up to 32 Kbytes Flash, integrated EEPROM,10-bit ADC, timers, UART, SPI, I²C

STMicroelectronics 

STM8S105xx

Electrical characteristics

Figure 19: HSE external clocksource

VHSEH

V HSEL

External clock

source

OSCIN

fHSE

STM8

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...).

Symbol

fHSE

Table 33: HSE oscillator characteristics

Parameter

Conditions

Min Typ Max

External high speed

oscillator frequency

1

16

Unit

MHz

RF

Feedback resistor

C(1)

Recommended load

capacitance(2)

220

kΩ

20

pF

IDD(HSE)

HSE oscillator power

consumption

C = 20 pF,

fOSC = 16 MHz

C = 10 pF,

fOSC =16 MHz

6 (startup)

1.6 (stabilized)(3)

mA

6 (startup)

1.2 (stabilized)(3)

gm

tSU(HSE) (4)

Oscillator

transconductance

Startup time

5

VDD is stabilized

1

mA/V

ms

(1) C is approximately equivalent to 2 x crystal Cload.

(2) The oscillator selection can be optimized in terms of supply current using a high quality resonator with

small Rm value. Refer to crystal manufacturer for more details

(3) Data based on characterization results, not tested in production.

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