====== MBa28 DIP switch settings ======

===== Boot Device Selection (S4 & S5) =====

To select the desired boot medium set the DIP switches S4 and S5 accordingly.

{{.:STK-MBa28_S4+S5_overview.jpg?500|}}
<WRAP clear></WRAP>
The following boot modes of the i.MX28 can be selected by the DIP switches S4 and S5 on the MBa28.

==== SD card ====
^ |:::   ^  S4  ||||::: ^  S5  ||||
^ |:::   ^  {{ :en:arm:tqma28:mba28:mba28_s4_sd.png?nolink&100 |}} ||||:::  ^ {{ :en:arm:tqma28:mba28:mba28_s5_sd.png?nolink&100 |}} ^^^^
^ DIP |::: ^  1  ^  2  ^  3  ^  4  | ::: ^  1  ^  2  ^  3  ^  4  ^
^ ON  | ::: |  |   |   |  •  | :::   |  •  | ++note| [[https://www.tq-group.com/content/download/12918/file/STK-MBa28.UM.104.pdf| see STK-MBa28 User's Manual, Table 69 ]] ++ |  •  | N/A  |    
^ OFF | ::: |  •  |  •  |  •  |     | :::  |   | :::   |   | :::  |
\\
<WRAP round important 80%> It is not possible to boot from SD card with the following Hardware combination TQMa28-A[C,D,E] Rev.02XX and MBa28 ≤ Rev.0105\\
++++ for a workaround please click here !!! |
Partlist
{{ :en:arm:tqma28:mba28:mba28_mod.png?nolink&200|}}
  * hookup wire
  * 1k resistor

TODO

  * solder hookup wire from DIP S4-2 to DIP S5-3 (On is printed on the side of DIP switch)
  * solder 1k resistor to Dip S5-3 (Number 3 is printed on the side of DIP switch) 
  * solder Connection between 1k resistor and the outer solder pad of R9
  * set DIP S5-3 on   
++++
</WRAP>

----


==== On-board eMMC ====
^ |:::   ^  S4  ||||::: ^  S5  ||||:::  
^ |:::   ^  {{ :en:arm:tqma28:mba28:mba28_s4_emmc.png?nolink&100 |}} ||||:::  ^ {{ :en:arm:tqma28:mba28:mba28_s5_emmc.png?nolink&100 |}} ^^^^
^ DIP |::: ^  1  ^  2  ^  3  ^  4  | ::: ^  1  ^  2  ^  3  ^  4  ^
^ ON  | ::: |  |   |   |     | :::   |     | ++note| [[https://www.tq-group.com/content/download/12918/file/STK-MBa28.UM.104.pdf| see STK-MBa28 User's Manual, Table 69 ]] ++|     | N/A  |    
^ OFF | ::: |  •  |  •  |  •  |  •  | :::  |  •  | :::   |  •  | :::  |

----

==== USB Recovery ====
^ |:::   ^  S4  ||||::: ^  S5  ||||
^ |:::   ^  {{ :en:arm:tqma28:mba28:mba28_s4_recovery.png?nolink&100 |}} ||||:::  ^ {{ :en:arm:tqma28:mba28:mba28_s5_recovery.png?nolink&100 |}} ^^^^
^ DIP |::: ^  1  ^  2  ^  3  ^  4  | ::: ^  1  ^  2  ^  3  ^  4  ^
^ ON  | ::: |  |  •  |   |     | :::   |  •   | ++note| [[http://www.tq-group.com/nc/download-disclaimer/?tx_abdownloads_pi1%5Baction%5D=getviewclickeddownload&tx_abdownloads_pi1%5Buid%5D=1844&cHash=f4ba7c16e746568621463e9a02974cb2| see STK-MBa28 User's Manual, Table 69 ]] ++ |     | N/A  |    
^ OFF | ::: |  •  |     |  •  |  •  | :::  |   | :::   |  •  | :::  |


----

===== CAN configuration (S1) =====
DIP switch S1 is used to configure the CAN interfaces CAN1 and CAN2.

{{.:STK-MBa28_S1_overview.jpg?500  |}}

==== Termination ====
^ DIP  ^ OFF (default)  ^  ON  ^
| S1-1 | CAN1 terminated (120Ω)  | CAN1 not terminated  |
| S1-2 | CAN2 terminated (120Ω)  | CAN2 not terminated  |

==== Slew rate ====
^ DIP  ^ OFF (default)  ^  ON  ^
| S1-3 | CAN1 slew rate configuration disabled  | CAN1 slew rate configurable by assembling R282  |
| S1-4 | CAN2 slew rate configuration disabled  | CAN2 slew rate configurable by assembling R281  |


----
===== RS485 configuration (S3) =====
DIP switch S3 is used to configure the RS485 interface.

{{.:STK-MBa28_S3_overview.jpg?500  |}}


==== Debug====
^ DIP  ^ OFF (default)  ^  ON  ^
| S3-1 | No function  | No function  |
| S3-2 | DEBUG = GND  | DEBUG = TQMa28 PU  |


==== Termination ====
^ DIP  ^ OFF (default)  ^  ON  ^
| S3-3 | RS485 RxD terminated (120Ω)  | RS485 RxD not terminated  |
| S3-4 | RS485 TxD terminated (120Ω)  | RS485 TxD not terminated  |