LPC2157 datasheet(39/45 Pages) NXP

部件名	LPC2157

功能描述	Single-chip 16-bit/32-bit microcontrollers; 512 kB flash, with 32 segment x 4 LCD driver

PDF	45 Pages

Scroll/Zoom	100%

制造商	NXP [NXP Semiconductors]

网页	http://www.nxp.com

标志

39 / 45 page

LPC2157_2158_2

Product data sheet

Rev. 02 — 9 February 2009

39 of 45

NXP Semiconductors

LPC2157/2158

Single-chip 16-bit/32-bit microcontrollers

9.1 Timing

10. Application information

10.1 Suggested USB interface solutions

Fig 9.

External clock timing (with an amplitude of at least Vi(RMS) = 200 mV)

tCHCL

tCLCX

tCHCX

Tcy(clk)

tCLCH

002aaa907

Fig 10. Differential data-to-EOP transition skew and EOP width

002aab561

TPERIOD

differential

data lines

crossover point

source EOP width: tFEOPT

receiver EOP width: tEOPR1, tEOPR2

crossover point

extended

differential data to

SE0/EOP skew

× TPERIOD + tFDEOP

Fig 11. LPC2158 USB interface using the CONNECT function on pin 17

LPC2158

USB-B

connector

CONNECT

soft-connect switch

−

VBUS

VSS

VDD

1.5 k

Ω

RS = 33 Ω

002aad410

RS = 33 Ω

LPC2157 数据表(PDF) 39 Page - NXP Semiconductors

LPC2157 数据表(HTML) 39 Page - NXP Semiconductors

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