NXP LPC2468 USB接口解方案

10-bit ADC with input multiplexing among 8 pins.

10-bit DAC.

Four general purpose timers/counters with 8 capture inputs and 10 compare

outputs. Each timer block has an external count input.

Two PWM/timer blocks with support for three-phase motor control. Each PWM has

an external count inputs.

RTC with separate power domain, clock source can be the RTC oscillator or the

APB clock.

2 kB SRAM powered from the RTC power pin, allowing data to be stored when the

rest of the chip is powered off.

WatchDog Timer (WDT). The WDT can be clocked from the internal RC oscillator,

the RTC oscillator, or the APB clock.

Standard ARM test/debug interface for compatibility with existing tools.

Emulation trace module supports real-time trace.

Single 3.3 V power supply (3.0 V to 3.6 V).

Three reduced power modes: idle, sleep, and power-down.

Four external interrupt inputs configurable as edge/level sensitive. All pins on port 0

and port 2 can be used as edge sensitive interrupt sources.

圖1.LPC2468方框圖

建議的USB接口解決方案

圖2.LPC2468和自有電源器件的USB接口方案

圖3.LPC2468和總線供電器件的USB接口方案

圖4.LPC2468 USB OTG端口配置方案:USB端口1 OTG雙功能器件,USB端口2主器件

圖5.LPC2468 USB OTG端口配置:VP_VM模式

圖6.LPC2468 USB OTG端口配置:USB端口2從器件,USB端口1主器件

圖7.LPC2468 USB OTG端口配置:USB端口1主器件,USB端口2主器件

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