STR73XF datasheet(31/40 Pages) STMICROELECTRONICS

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STR73xF

Electrical characteristics

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3.8

PLL electrical characteristics

VDD = 5V ± 10%, TA = -40 / +105°C, unless otherwise specified.

3.9

RC oscillator electrical characteristics

VDD = 5V ± 10%, TA = -40 / +105°C, unless otherwise specified.

Table 12.

PLL Electrical Characteristics

Symbol

Parameter

Conditions

Value

Unit

Min

Typ

Max

fPLLIN

(1)

fPLLIN is obtained from fOSC directly or through an optional divider by 2.

PLL reference clock

FREF_RANGE = ‘0’

FREF_RANGE = ‘1’

1.5

3.0

5.0

MHz

fPLLOUT

PLL output clock

MX = ”00”

MX = ”01”

MX = ”10”

MX = ”11”

20 x fPLLIN

12 x fPLLIN

28 x fPLLIN

16 x fPLLIN

MHz

fMCLK

System clock

DX = 1..7

fPLLOUT/DX

MHz

fFREE

PLL free running

frequency

FREF_RANGE = ‘0’, MX0 = ’1’

FREF_RANGE = ‘0’, MX0 = ’0’

FREF_RANGE = ‘1’, MX0 = ’1’

FREF_RANGE = ‘1’, MX0 = ’0’

120

240

480

kHz

tLOCK

PLL lock time

stable oscillator

(fPLLIN = 4 MHz), stable VDD

300

µs

∆tPKJIT

PLL jitter (pk to pk)

fPLLIN = 4 MHz (pulse

generator)

fPLLIN = 4 MHz (resonator)

1000

500

∆tLTJIT

PLL Long term jitter

fPLLIN = 4 MHz (pulse

generator)

Table 13.

RC oscillator electrical characteristics

Symbol

Parameter

Conditions

Value

Unit

Min

Typ

Max

fRC

RC High Frequency

TA = 25

oC,

CMU_RCCTL=0x8

2.34

MHz

RC Low Frequency

kHz

IDD(RC)

RC High Frequency

Current

µA

RC Low Frequency

Current

µA

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