Lpc2000

Kevin,

AFAIK, there are two "standard" USB-to-UART bridges:
SiLabs' CP210x and FTDI's FT232R/FT245R.

The main differences are:
1. SiLabs have more mA on 3.3V regulator.
2. FTDI have an oscillator.
3. FTDI have no-QFN package option.
4. FTDI have more parallel I/O.

Both provides TTL-level Serial and Parallel interface.
Both works excellent.

Regards,

Aryeh


--- In lpc2000@yahoogroups.com, "kms34655" <kms34655@...> wrote:
>
> I am a newbie to USB. 
> 
> I want to develop a device that is 1) a soundcard and 2) a virtual 
> COM port. I want to be able to plug this device into a computer USB 
> port and have it operate as both a sound card and a COM port. 
> 
> I've been looking at all the different chips available for USB and 
> I'm not sure of the best approach. I was hoping that there might be 
> someone out there with a broad knowledge of the available hardware 
> along with the USB experience that could suggest what to use to 
> create this product. For example: can the FTDI FT2232 interface to 
a 
> sound chip using a serial interface (SPI, etc...) via its MPSSE 
> interface? I'm looking at purchasing the Keil MCB2140 evaluation 
> board as it looks like the Phillips LPC2141 microcontroller can 
> handle both functions in one chip. 
> 
> Are there any other USB devices out there that can perform these 
two 
> functions? 
> 
> Thanks, 
> 
> Kevin
>