|ARM Technical Support Knowledge Articles|
ARM9TDMI-based cores are provided with debug scan chains 0, 1 and 2.
The Technical Reference Manual (TRM) for each core specifies which bits are included in each scan chain, but does not state explicitly which end of each chain is the input (TDI) and which end is the output (TDO).
The scan chain orders are:
Date value 
The full scan chain bit order may be found in each TRM as follows:
|Core||TRM||Chain 0, 1||Chain 2|
|ARM9TDMI||ARM DDI 0145B||pp 6-3 to 6-5||p 5-25|
|ARM920T||ARM DDI 0151C||pp 9-24 to 9-28||p 9-29|
|ARM922T||ARM DDI 0184B||pp 9-24 to 9-28||p 9-29|
|ARM940T||ARM DDI 0144B||pp 10-4 to 10-6||p 8-22|
Article last edited on: 2008-09-09 15:47:44
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