STM8S105K4B3(2015) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM8S105K4B3
(Rev.:2015)

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

STMicroelectronics 

STM8S105x4/6

Electrical characteristics

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 startup stabilization time. Refer to the crystal resonator manufacturer for more details

(frequency, package, accuracy...).

Table 32. HSE oscillator characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSE

External high speed

oscillator frequency

-

1

-

16

MHz

RF

Feedback resistor

-

C(1)

Recommended load

capacitance(2)

-

-

220

-

-

-

k

20

pF

IDD(HSE)

HSE oscillator power

consumption

C = 20 pF

fOSC = 16 MHz

C = 10 pF

fOSC = 16 MHz

-

-

-

6 (start up)

1.6 (stabilized)(3)

mA

-

6 (start up)

1.2 (stabilized)(3)

gm

Oscillator

transconductance

-

5

-

-

mA/V

tSU(HSE)(4) Startup time

VDD is stabilized

-

1

-

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.

4.

rtSeUa(cHhSeEd).isThthise

start-up

value is

time measured

measured for a

from the

standard

moment it is enabled

crystal resonator and

(by software) to a stabilized

it can vary significantly with

16 MHz oscillation is

the crystal manufacturer.

DocID14771 Rev 15

67/121

90

Share Link: