Differences

This shows you the differences between two versions of the page.

--- jtag [2016/02/17 10:22] – fix JTAG to SWJ, restructure kingkevin
+++ jtag [2017/03/30 12:42] – add MB936 kingkevin
@@ Line 8: / Line 8: @@
 The Debug Port is often called JTAG-DP for JTAG and SW-DP for SWD.
 SWJ capable device include and often combine both, as the SWD signal pins SWDIO and SWCLK re-use the JTAG signal pin JTMS and JTCK (backwards compatible).
+Most 32 bits micro-controllers and SoCs have one of both (or both).
-Most 32 bits micro-controllers and SoCs have one of both (or both).\\
 On the other side you need a SWJ adapter so the host can speak to the device using the JTAG and/or SWD protocol.
 SWJ adapters can go from cheap (<5$) to expensive (>1000$), depending on the quality of the hardware and software.
@@ Line 57: / Line 57: @@
 I am using cheap clones.
+==== ST-LINK/V2 clone ====
+{{:jtag:mb936_case-front.jpg?0x150|case front}}
+{{:jtag:mb936_case-back.jpg?0x150|case back}}
+{{:jtag:mb936_internal-front.jpg?0x150|internal front}}
+{{:jtag:mb936_internal-front2.jpg?0x150|internal front}}
+{{:jtag:mb936_internal-back.jpg?0x150|internal back}}
+This is a complete rip-off of the [[http://www.st.com/web/catalog/tools/FM146/CL1984/SC724/SS1677/PF251168|ST-LINK/V2]].
+It comes in the same box, with the same cables, the enclosure is the same, even the board name has been taken over (MB936), but the board isn't the same.
+The BOM doesn't match with the [[http://www.st.com/resource/en/bill_of_materials/st-link_v2_bom.zip|original]].\\
+The original adapter come with ESD protection, protection resistors, and a transceiver to allow operating with target signal levels of 1.65V to 5.5V.
+This is completely missing on the clone since the connector pins are directly connected to the micro-controller.
+Thus it only supports target signal levels of 3.3V and sometimes 5V since the pins are 5V tolerant.
+For $9 you can't expect more, and if you want a cheap adapter I recommend the other ones (see below).
 ==== BAITE ====