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AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/JTAG

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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
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<section end=History/>
__FORCETOC__
<section begin=Body/>
==JTAG interface ==
 
''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
=== Description ===
The JTAG interface available on the Evaluation Kit at the connector ''TBD:Jxxx''JD1. By default, the connector is not populated.
''Jxx'' JD1 is a ''TBD:connector-type'' 10x2.54mm header connector for the RS232 two-wires UART3 port, JTAG signals used for debug purposes (bootloader and operating system serial console)togheter with a JTAG debugger.
[[File:{{{nome-som}}AXEL_ULite-EVB-JTAG-connector.png|thumb|center|500px|JTAG connector]]
===Signals ===
{| class="wikitable"
! latexfontsize="scriptsize"| Pin#
! latexfontsize="scriptsize"| SOM Pin#
! latexfontsize="scriptsize"| Pin name
! latexfontsize="scriptsize"| Pin function
! latexfontsize="scriptsize"| Pin Notes
|-
|1,2,4,6,,7,8,10!Pin# | -!Pin name| N.A.!Function| N.C.| Not connected!Notes
|-
| 3JD1.1 || DGND | J1.189| RS232_RX- | Receive line| -
|-
| JD1.2 || JTAG_TCK || - || -|-|JD1.3|| JTAG_TMS || - || -|-|JD1.4 || JTAG_TDO || - || -|-|JD1.5 || JTAG_TDI || - || -|-|JD1.6 || JTAG_nTRST || - || optionally connected (mount option)|-| J1JD1.1877 || CPU_PORn || - || optionally connected (mount option)| RS232_TX-| Transmit lineJD1.8 || N.C. || - || -| -|JD1.9 || N.C. || - || -|-|JD1.10 || JTAG_VREF || - || 3V3 (SOM_PGOOD driven signal)
|-
| 9
| -
| DGND
| Ground
|
|}
<section end=== Device mapping ===UART3 is mapped to <code>Body/dev/ttymxc2</code> device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel. === Device usage === To connect to the debug serial port: # connect the DB9 adapter bracket to the J22 connector on the SBCX board# connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)# start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1 ----
[[Category:AXEL ULite]]
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