I was able to successfully remove the LPC1756 processor from the board and install another LPC1756 that I ordered from DigiKey. I ordered the firmware update program and installed the firmware. Everything seems to be working fine. Thanks for all the help.
Tom

Thanks for the reply. I am supplying 12 V to 3 regulators simultaneously. The LM7806 supplies the SuperPro; the UA78M33C supplies an oscillator chip with only I2C connections to the CPU; the LM7805 with a diode in series supplies 4.3 V to an optoencoder with 2 connections to the CPU inputs. There is...

I previously ordered a super pro board and everything was working fine. I am supplying it with a regulated 6 volts. Today I turned it on and it was drawing too much current. I removed U2, C15, C4, C5, and C6 but still have a 10 ohm resistance between VDD and GND. I think the problem must be in the L...

Sorry it has taken me so long to reply. I am using v5.19 of Tools. The examples and libraries appeared under Coridium in Program Files(x86) when things were flaky. I reinstalled under My Programs instead of Program Files(x86) and everything is working fine now. I have had this issue with other appli...

The MID function in VBSTRING.bas has an error in it. The statement "sharedString = right(s,len(s) - start -1)" should read "sharedString = right(s,len(s) - start + 1)"

If you install BASICtools in program files (x86), which is the default, some of the library functions will not work due to path problems. In particular, <VBSTRING> contains the MID function. The program will compile correctly but will not run correctly. When you call the MID function, the MID functi...

Thanks for the PCB layout. I rechecked my voltages and I had 2.7 volts on the Vrefp and analog Vdd. I measured 0.5 volt drop across the 330 ohm resistor. I replaced the 330 ohm resistor with a ferrite chip bead that has 600 ohm impedance at 100 Mhz. Everything seems to be working normally now. Thank...

The schematic and data sheet for the LPC1751 show that pin 10 is for Vrefp and pin 8 is for analog Vdd. On my board pin 10 is not connected to anything and pin 8 is only connected to the bypass capacitor. Neither is connected to 3.3 volts and pin 10 measures 0 volts when the board is powered. I have...

Pin 10 which is the positive reference for the A/D on the pro+ board does not seem to be connected to anything. Am I missing something? The A/D seems to return a correct value if I assume Vrefp = 2.703 volts, but I thought it should be 3.3 volts.
Thanks, Tom

Thanks, I turned the power on to both I2C interfaces by writing hex(7C8925E) to SCB_PCONP and now I can read both status registers.