Hi John,
First, no inverter is needed.
Next, Hold both buttons down, then release the reset while still
holding the P0.14 line.
regards,
Charles
--- In lpc2000@yahoogroups.com, jstamos111@... 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?
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