Lpc2000

--- In lpc2000@yahoogroups.com, "Curt Powell" <curt.powell@s...> 
wrote:
> Can anyone steer me towards some simple tone generators that can 
easily be
> interfaced to the lpc using gpio (as few pins as possible) or i2c?  
Nothing
> fancy, we need to control frequency and duration (volume will be 
controlled
> manually if at all).

Take a look at using a PWM output.