Lpc2000

--- In lpc2000@yahoogroups.com, "Chris Graham" <chris_e_gr@y...> 
wrote:
> I've designed an LP2106 board that includes a few special features 
I need 
> such as MIDI, an EPROM, etc.  I've had the alpha PCB manufactured 
and 
> intalled the parts, and am now testing.  (If I can get this 
working, I may 
> make the design available in the list archives as its MIDI 
capabilites could 
> be useful to others)
> 
> I put a JPG of the schematic here 
> http://members.shaw.ca/photonwind/Images/Processor%20Schematic.JPG.
> 
> I first populated the power supply parts and verified that the 
voltages were 
> correct.  Then I populated all the parts related to the processor, 
reset, 
> and the MAX3221 serial converter.
> 
> I'm now trying to get the bootloader to work.  I installed the 
jumper to tie 
> P0.14 low, started up the Philips bootload utility, set 9,600 baud 
and set 
> the crystal frequency to 14746 khz to match the board's crystal.
> 
> Then I pressed the "Upload to Flash" button and hit the reset 
button  when 
> promped.  The board does not respond.  I can trace the RS232 
signal from the 
> PC through the MAX3221 to the correct pin on the LP2106.  I also 
verified 
> that the Reset button is pulling the RST pin low, and the P0.14 
pin is 
> really pulled low.
> 
> I see no signal being returned by the board out of TXD0 to the 
MAX3221.
> 
> I've done all this in the past with a TiniArm board and the setup 
external 
> to the board is the same, so I know generally what I'm doing.
> 
> Is this a reasonable way to test a new board?  Have I overlooked 
anything?
> 
> Thanks in advance.
> 

Chris

Is pins 17 and 40 really not connected, as per your schematic?
With no I/O supply, I expect you won't be getting any I/O.
Hope this helps.
Greg