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 12:50] – move aluminium 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 ====
-==== BAITE ====
+{{: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}}
-The first clone is a [[http://www.aliexpress.com/item/Free-Shipping-1SET-ST-Link-st-link-V2-for-STM8S-STM8L-STM32-Cortex-M0-Cortex-M3/1758613434.html|BAITE]] ST-Link V2.
+This is a complete rip-off of the [[http://www.st.com/web/catalog/tools/FM146/CL1984/SC724/SS1677/PF251168|ST-LINK/V2]].
-It supports JTAG, SWD, and SWIM (for STM8).
+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.
-{{:jtag:dsc02404.jpg?0x100|device front}}
+For $9 you can't expect more, and if you want a cheap adapter I recommend the other ones (see below).
-{{:jtag:dsc02405.jpg?0x100|device back}}
-{{:jtag:dsc02403.jpg?0x100|PCB front}}
-{{:jtag:dsc02406.jpg?0x100|pinout sticker}}
-{{:jtag:st-link_v2_baite.svg?0x100|pinout}}
-STM32F103C8 connection:
-^ STM32F103C8 signal ^ STM32F103C8 pin ^ adapter pin ^ adapter signal ^
-| PA7 | 17 | 1 | JRST |
-| AMS1117 |  | 2 | 3V3 |
-| USB VCC |  | 3 | 5V |
-| PA4 | 14 | 4 | JTCK/SWCLK |
-| PB11 | 22 | 5 | SWIM |
-| PA14 | 37 | 6 | JTMS/SWDIO |
-| USB GND |  | 7 | GND |
-| PA5 | 15 | 8 | JTDO |
-| PB6 | 42 | 9 | SWIM_RST |
-| PA6  | 16 | 10 | JTDI |
-| PB12,PB14 | 25,27 |  |  100 ohms |
-| PB5 | 41 |  | LED |
-the adapter pins are protected with a 220 ohms resistor.
 ==== aluminium ====
@@ Line 110: / Line 98: @@
 | USB VCC  |  | 10 | 5V |
 | PA9 | 30 | current source  | LED |
+==== BAITE ====
+The first clone is a [[http://www.aliexpress.com/item/Free-Shipping-1SET-ST-Link-st-link-V2-for-STM8S-STM8L-STM32-Cortex-M0-Cortex-M3/1758613434.html|BAITE]] ST-Link V2.
+It supports JTAG, SWD, and SWIM (for STM8).
+{{:jtag:dsc02404.jpg?0x100|device front}}
+{{:jtag:dsc02405.jpg?0x100|device back}}
+{{:jtag:dsc02403.jpg?0x100|PCB front}}
+{{:jtag:dsc02406.jpg?0x100|pinout sticker}}
+{{:jtag:st-link_v2_baite.svg?0x100|pinout}}
+STM32F103C8 connection:
+^ STM32F103C8 signal ^ STM32F103C8 pin ^ adapter pin ^ adapter signal ^
+| PA7 | 17 | 1 | JRST |
+| AMS1117 |  | 2 | 3V3 |
+| USB VCC |  | 3 | 5V |
+| PA4 | 14 | 4 | JTCK/SWCLK |
+| PB11 | 22 | 5 | SWIM |
+| PA14 | 37 | 6 | JTMS/SWDIO |
+| USB GND |  | 7 | GND |
+| PA5 | 15 | 8 | JTDO |
+| PB6 | 42 | 9 | SWIM_RST |
+| PA6  | 16 | 10 | JTDI |
+| PB12,PB14 | 25,27 |  |  100 ohms |
+| PB5 | 41 |  | LED |
+the adapter pins are protected with a 220 ohms resistor.
 ===== Altera USB-Blaster =====