SPC582BX datasheet(40/115 Pages) STMICROELECTRONICS

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Electrical characteristics

SPC582Bx

40/115

DS11597 Rev 4

4.10.2

PLL1

PLL1 is a frequency modulated PLL with Spread Spectrum Clock Generation (SSCG)

support.

Table 20. PLL1 electrical characteristics

Symbol

Parameter

Conditions

Value

Unit

Min

Typ

Max

fPLL1IN

—

PLL1 input clock(1)

—

37.5

—

87.5

MHz

ΔPLL1IN

—

PLL1 input clock duty

cycle(1)

—35

—

fINFIN

—

PLL1 PFD (Phase

Frequency Detector)

input clock frequency

—

37.5

87.5

MHz

fPLL1VCO

PLL1 VCO frequency

—

600

—

1400

MHz

fPLL1PHI0

PLL1 output clock PHI0

—

4.762

—

FSYS(2)

MHz

tPLL1LOCK

PLL1 lock time

—

µs

fPLL1MOD

PLL1 modulation

frequency

—

250

kHz

|δPLL1MOD|CC

PLL1 modulation depth

(when enabled)

Center spread(3)

0.25

—

Down spread

0.5

—

|ΔPLL1PHI0SPJ|

(4)

PLL1_PHI0 single period

peak to peak jitter

fPLL1PHI0 =

200 MHz, 6-sigma

——

500(5)

IPLL1

PLL1 consumption

FINE LOCK state

—

1. PLL1IN clock retrieved directly from either internal PLL0 or external FXOSC clock. Input characteristics are granted when

using internal PPL0 or external oscillator is used in functional mode.

2. Refer to Section 4.3: Operating conditions for the maximum operating frequency.

3. The device maximum operating frequency FSYS (max) includes the frequency modulation. If center modulation is selected,

the FSYS must be below the maximum by MD (Modulation Depth Percentage), such that FSYS(max)=FSYS(1+MD%).

Refer to the Reference Manual for the PLL programming details.

4. Jitter values reported in this table refer to the internal jitter, and do not include the contribution of the divider and the path to

the output CLKOUT pin.

5. 1.25 V±5%, application noise below 40 kHz at VDD_LV pin - no frequency modulation.

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