Lpc2000

Hello,

I am writing my own code to do JATG on LPC chips. In Shift-IR state, I 
am able to select any one of the JTAG commands and I get back 0001 as 
the ARM manual says. IDCODE and BYPASS work just fine when I 
read/write data in Shift-DR state.

Now, When I want to select a chain using SCAN_N command, I get 0001 in 
Shift-IR state as the manual says but in the Shift-DR state I do not 
get back 1000!

Is there anything I should do before SCAN_N?
Is anyone able to write SCAN_N Shift-DR and got back 1000?

Thanks,

Gus