LPC2109 datasheet(38/44 Pages) NXP

38 / 44 page

LPC2109_2119_2129_6

Product data sheet

Rev. 06 — 10 December 2007

38 of 44

NXP Semiconductors

LPC2109/2119/2129

Single-chip 16/32-bit microcontrollers

Dynamic characteristics

[1]

Parameters are valid over operating temperature range unless otherwise speciﬁed.

[2]

Bus capacitance Cb in pF, from 10 pF to 400 pF.

Table 10.

Dynamic characteristics

Tamb = −40 °C to +85 °C for industrial applications; VDD(1V8), VDD(3V3) over speciﬁed ranges.[1]

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

External clock

fosc

oscillator frequency

supplied by an external

oscillator (signal generator)

MHz

external clock frequency

supplied by an external

crystal oscillator

MHz

external clock frequency if

on-chip PLL is used

MHz

external clock frequency if

on-chip bootloader is used

for initial code download

MHz

Tcy(clk)

clock cycle time

1000

tCHCX

clock HIGH time

Tcy(clk) × 0.4

tCLCX

clock LOW time

Tcy(clk) × 0.4

tCLCH

clock rise time

tCHCL

clock fall time

Port pins (except P0[2] and P0[3])

rise time

fall time

I2C-bus pins (P0[2] and P0[3])

fall time

VIH to VIL

[2] 20 + 0.1

× Cb --ns

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