View source for ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/JTAG

===Signals ===

The following table describes the interface signals:

{| class="wikitable" 
! latexfontsize="scriptsize" | Pin#
! latexfontsize="scriptsize" | Pin name
! latexfontsize="scriptsize" |Function
! latexfontsize="scriptsize" |'''ARM-20 JTAG'''
! latexfontsize="scriptsize" | Notes
|-
|1
|DGND
| -
|4,6,8,10,12,14,16,18,20
|For example documented on [https://www2.lauterbach.com/pdf/app_arm_jtag.pdf#page=3 Lauterbach specification]
|-
|2
|JTAG_TCK
| -
|9
| -
|-
|3
|JTAG_TMS
| -
|7
| -
|-
|4
|JTAG_TDO
| -
|13
| -
|-
|5
|JTAG_TDI
| -
|5
| -
|-
|6
|JTAG_MOD
| -
| -
|10K pull-down inside the SoM
|-
|7
|CPU_PORn
| -
|15 (*)
| -
|-
|8
|N.C.
| -
| -
| -
|-
|9
|N.C.
| -
| -
| -
|-
|10
|JTAG_VREF
| -
|1
|3V3 (BOARD_PGOOD driven signal)
|}
(*) optional signals, keep the possibility to be unconnected.


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[[Category:ORCA]]