Program Download via ISP
UART#0 can be used to download program code into the internal FLASH of the LPC2148. The ISP (In-System Programming) feature of the LPC2148 is then used. ISP is enabled after reset by pulling pin P0.14 low. In order to enable automated ISP invocation, the LPC2148 Education Board allows control of both the reset signal and P0.14, via the Rs232 port controlled by the DTR serial signal and P0.14 via RTS. FlashMagic from ES Academy is however the recommended ISP download program to use. The program can be downloaded from: http://www.flashmagictool.com/
and philips flash utility from this link PHILIPS FLASH UTILITY
Basics of ISP programming
How to enable Manual ISP Mode ?