CEquel Digital Systems Overview
Page 7 of 16
Updating Firmware
RS-232 Method
Part 1. If the microcontroller (U1, LPC2142) has NEVER been programmed before
Connect the Serial 4-pin header to J2.
IMPORTANT!! The header MUST be connected with the correct polarity or fatal damage
can result. Pin 1 on the header should be connected to pin 1 of the connector. See figure
below:
To program a new device connect the header to J2 and apply power. TP17 does NOT have to be
pulled low because the micro does not have a valid program to run and will therefore
automatically enter bootloader mode.
Open up the Philips Flash Utility Program (version 2.2.2)
Under Flash Programming, make sure the correct file is selected to download.
Select the Device (LPC2142),
Select the XTAL Freq. (kHz): 16000
Select the Erase Entire Device button
Select the correct file to load: (currently XTI_LPC_01_00_08b.hex)
Press the Read Device ID button. The Part ID and Bootloader ID will show up. If they do
not and this operation times out, then most likely, the device is not in bootloader mode, there is
something wrong in the configuration or setup or the cable is not correctly connected. If the
device is not in bootloader mode proceed to Part 2.
Select Upload to Flash and the programming will start.
After it is finished you may select Compare Flash. This will read back the flash memory
and compare it to what was just programmed (Pass/Fail)
Cycle the Power to the amp and close the Flash Utility Program.
Xti Amp (back)
(front) J2 ::
FRONT
Serial
Interface
board
PC
RS-232
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