STLUX385ATR datasheet(80/99 Pages) STMICROELECTRONICS

80 / 99 page

Electrical characteristics

STLUX385A

80/98

DocID024387 Rev 2

Figure 17. HSE external clock source

HSE crystal/ceramic resonator oscillator

The HSE clock can be supplied with a 1 to 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...).

HSEH

(2)

HSEOSCIN input pin high level

voltage

0.7 x V

HSEL

(2)

HSEOSCIN input pin low level

voltage

0.3 x V

LEAKHSE

(2)

HSEOSCIN input pin leakage

≤V

IN ≤

-1

μA

In case f

HSE

is configured as direct clock for the SMED logics the maximum frequency can be 24 MHz.

Data based on characterization results, not tested in production.

Table 42. HSE crystal/ceramic resonator oscillator

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

HSE

External high speed

oscillator frequency

116

(1)

MHz

Feedback resistor

220

Ω

, C

(2)

Recommended load

capacitance

(3)

DD(HSE)

HSE oscillator power

consumption

6(startup)

2(stabilized)

Table 41. HSE user external clock characteristics (continued)

Symbol

Parameter

Conditions

Min.

Max.

Unit

VHSEH

VHSEL

External clock

source

Hse Oscin

fHSE

GIPD100520131400FSR

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