how can I burn bootloader into Flash?Thanks

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Please give us some more information about the Flash and the PCB. Are there any homepage with the PCB and/or the design?

Cheers Rune Christensen

No, the RCA1802 does not have JTAG interface.... .... or perhaps you were using a different processor?

Cheers, Alf

Possibly. Have a look at the manual of the controller in question. It may or may not have JTAG enabled at power up.

Rene

Depends on which chip you are using. The AT91 ARM7s need a JTAG interface unless you have a combo chip with internal flash. They get delivered with preprogrammed flash.

The AT91RM9200 has a cool bootrom which will check if the flash is programmed and if so, boot from the flash otherwise it will establish an X-Modem communication on the debug UART or Device Firmware Upgrade via USB.

Both method will only require a standard PC and a standard serial cable. No JTAG ICE needed.

Are you sure it doesn't (didn't)?

If you pulse each of the EFn lines low in sequence at the rhythm of a close encounter of the third kind and then wait until the Q lines goes high/low and if you pulse the TPA line high when the TPB is high that will put the RCA1802 in the JTAG download mode. :-D

I swear this scheme was published on RCA's web site ;-)

Mostafa