Lpc2000

Hi,

I am trying to program my flash memory via the JTAG interface.
However, I am unable to find enough documentation on the JTAG interface.
Can anyone give me a kickstart?

I am trying to flash in two ways:
1) From the flash itself (Firmware update).
2) Externally (initial flash).

Ad 1)
This is the most important one for me.
To achieve this I need to execute my firmware update code in RAM (and 
make sure that interrupt vectors and such reside there as well).
I believe I have to use IAP. JTAG is also a serial interface, but I 
don't think it is possible to connect ISP and JTAG (UART only). IAP is 
not really a problem, but I do not know how to connect my IAP 
implementation to the JTAG interface. So basically: How do I copy data 
over the JTAG interface to RAM?

Ad 2)
I can use the Philips ISP flash tool to flash via the UART interface or 
any commercially available tool via the JTAG interface. But I want to 
be able to batch this process (and maybe configure it). I must use the 
JTAG interface and I am the only budget available. :-)

Thanks in advance for any help,
Greetz,
David