Posted on May 17, 2011 at 09:49Hi,
I am trying to connect STR912 based target(self made PCB) board with Parallel Port Based Jtag hardware.
This is first time I am working on STR9. I am unable to detect target device through H-JTAG.
I am facing following problems..
I have kept TAP configuration as suggested in H-JTAG User Manual Fig 3-12
TAP Num – 0 IReg Len – 5
TAP Num – 1 IReg Len – Auto
TAP Num – 2 IReg Len – 8
Iam getting device id as 0x12CB3020
When the TAP configuration is not done I got 0x02471E40
Both are invalid device ids.
In site link
http://www.hjtag.com/pic/TAPConfig.jpg
a different TAP configuration is mentioned like this.
TAP Num – 1 IReg Len – 5
TAP Num – 1 IReg Len – Auto
TAP Num – 1 IReg Len – 8
I have not yet tried out this TAP configuration.
Please let me know which is correct.
Is Target Reset is must as shown in Fig:3-11.
And also can I use nSRST instead of nTRST to reset target hardware for the figure shown in 3-11 of H-JTAG user manual as I do not have support for nTRST in my JTAG hardware.
By seeing the change of Device ID received when TAP configuration is changed can I ensure chip is working to some extent.
Please let me know how I could proceed further in these circumstances.
Thanks in advance for the support,
