Lpc2000

Sounds similar to a problem I had.  Philips assigned RTS and DTR to the 
wrong pins in figure 2 of ap note 10302.  If you RTS and DTR to their 
correct pins then they are reversed in your design.  You can put a breakout 
box between your PC and your target and use it to swap RTS and DTR if that 
is the problem.

If P0.14 is low after Reset is released (reset goes high) you should be in 
the boot loader.

Why do you have the inverters in Rx/Tx?  Straight out of the max233 works 
fine and is required for the reset and P0.14 signals to be properly 
controlled by the Flash Utility.



scott kendall
Systronix, Inc
Salt Lake City, Utah



At 15:09 2006-04-20 -0400, you wrote:
>Hey All,
>
>I\'m having trouble getting the ISP to work with the Philips Flash Utility 
>for a board I made that uses the LPC2106 processor.  I\'ve also tried 
>using hyperterminal and sending \'?\', but get no response.
>
>I\'ve connected the UART0 send and recv to an inverter and then to a 
>max233.  Anyone know if this is right?  Originally I did not have the 
>inverter, but I noticed that the max233 inverts its outputs.
>
>I\'m also wondering if perhaps I\'m not holding the proper buttons 
>down.  I have two buttons that when pressed pull their respective pins low 
>on the LPC processor.  The buttons are on the ~RST and P0.14 pins.  When I 
>go to use the flash utility or a terminal I know I hit the reset button, 
>do I also need to hit the P0.14 button.  Do I hold these down when I go to 
>read the device ID or when I start sending the question marks?
>
>I am pretty sure I\'ve got the settings right on the Philips utility.  My 
>processor\'s clock is 10Mhz and I set that.  I set the baud rate to 9600 
>as well.  When I use HyperTerminal I set the bits per second to 9600, the 
>databits to 8, parity to none, stop bits to 1, and flow control to none.
>
>Any idea why I might be having this problem?  Anything else you need to know?
>
>Thanks.
>- John
>
>
>
>Yahoo! Groups Links
>
>
>
>