LPC4350 datasheet(101/145 Pages) NXP

101 / 145 page

LPC4350_30_20_10

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Objective data sheet

Rev. 2.1 — 23 September 2011

101 of 145

NXP Semiconductors

LPC4350/30/20/10

32-bit ARM Cortex-M4/M0 microcontroller

11. Dynamic characteristics

11.1 Digital I/O and CLKOUT pins, oscillator, PLL, and C_CAN

[1]

Oscillator start-up time depends on the quality of the crystal. For most crystals it takes about 1000 clock pulses until the clock is fully

stable.

Table 10.

Dynamic characteristics: Digital I/O and CLKOUT pins, oscillator, PLL, and C_CAN

VDD(IO) , VDD(REG)(3V3) over specified ranges; all voltages are measured with respect to ground; positive currents flow into the

IC; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Digital I/O pins

tTHL

HIGH to LOW transition

time

CL = 30 pF

<tbd>

tTLH

LOW to HIGH transition

time

CL = 30 pF

<tbd>

CLKOUT pin

fclk

clock frequency

on pin CLKOUT

<tbd>

MHz

Oscillator

tstartup

start-up time

at maximum frequency

[1] -<tbd>

s

PLL0

fi(PLL)

PLL input frequency

0.014

MHz

fo(PLL)

PLL output frequency

4.3

550

MHz

CCO; direct mode

275

550

MHz

PLL1

fi(PLL)

PLL input frequency

MHz

fo(PLL)

PLL output frequency

160

MHz

CCO; direct mode

156

320

MHz

Jitter specification for C_CAN

tjit(cc)(p-p)

cycle to cycle jitter

(peak-to-peak value)

on CAN TD1 pin

<tbd>

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