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found the problem and solution too.  i had pull up on RST, removed it and its working.

I am trying to program LPC952 using flash magic.  I am using keil to program.

I am able to erase the device but it is not progrmming the flash.

following is the message in the keil message window.

"FM.EXE" "DEVICE(P89LPC952,18.0) ERASE(DEVICE,PROTECTISP) HEXFILE("H:\Projects\Venaflow MOD 8\Examples\NXP LPC954\Mod8_0_1_1\Mod8_1.HEX",NOCHECKSUMS,NOFILL,PROTECTISP) COM(3,9600) HARDWARE(KEILMCB900)"
Flash Magic Version 4.15.270
8051/XA Driver Version 2.41.267
ARM Driver Version 1.41.267
(C) Embedded Systems Academy 2000-2008 All rights reserved
NON PRODUCTION USE ONLY
Connected
Device selected
Erase complete (DEVICE)

please advice.

Still it gives me following error,

Program Size: data=9.0 xdata=0 code=146
creating hex file from "123"...
"123" - 0 Error(s), 0 Warning(s).
"C:\Program Files\Flash Magic\FM.EXE" "DEVICE(P89LPC954,18.0) ERASE(DEVICE,PROTECTISP) HEXFILE("H:\Projects\Venaflow MOD 8\Examples\NXP LPC954\serial_IRQ\123.HEX",NOCHECKSUMS,NOFILL,PROTECTISP) COM(3,9600) HARDWARE(KEILMCB900, 250,120)"
Flash Magic Version 4.14.269
8051/XA Driver Version 2.41.267
ARM Driver Version 1.41.267
(C) Embedded Systems Academy 2000-2008 All rights reserved
NON PRODUCTION USE ONLY
ERROR: Invalid parameters for DEVICE directive: DEVICE(P89LPC954,18.0)


here is the copy of the command line paramenters
COM(3, 9600)
DEVICE(89LPC954, 3.686400)
HARDWARE(KEILMCB900, 250, 120)
ERASE(DEVICE, PROTECTISP)
HEXFILE(H:\Projects\Venaflow MOD 8\Examples\Philips LPC95x\Mod8_0_0_2\Mod8_1.hex, NOCHECKSUMS, NOFILL, PROTECTISP)

I was using flash magic with keil to download my hex files in to LPC952 and it was working great.

but when i tried to use with LPC954, i am getting following error:

"C:\Program Files\Flash Magic\FM.EXE" "DEVICE(P89LPC954,18.0) ERASE(DEVICE,PROTECTISP) HEXFILE("H:\Projects\Venaflow MOD 8\Examples\NXP LPC954\serial_IRQ\123.HEX",NOCHECKSUMS,NOFILL,PROTECTISP) COM(3,9600) HARDWARE(KEILMCB900)"

Flash Magic Version 4.14.269

8051/XA Driver Version 2.41.267

ARM Driver Version 1.41.267

(C) Embedded Systems Academy 2000-2008 All rights reserved

NON PRODUCTION USE ONLY

ERROR: Invalid parameters for DEVICE directive: DEVICE(P89LPC954,18.0)

am i missing something ?

thanks for your help in advance.