Differences

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

--- jtag [2019/04/15 20:51] – [SEGGER J-Link] add jlink v10 kingkevin
+++ jtag [2021/04/29 10:52] – [DISTORTEC JTAG-lock-pick Tiny 2] kingkevin
@@ Line 73: / Line 73: @@
 For $9 you can't expect more, and if you want a cheap adapter I recommend the other ones (see below).
-==== ST-LINK V2 aluminium ====
+==== mini ST-LINK V2 ====
 These adapters come in a small dongle sized aluminium case.
@@ Line 144: / Line 144: @@
 This variant uses an STM32F103 in the UFQFN-48 package.
 This is just a couple of cents cheaper than the more traditional TQFP-48 package, but this is enough en mass to change the footprint on the board.
+=== MINI ST-Link V2E ===
+{{:jtag:mini_st-link_v2e-case.jpg?0x100|}}
+{{:jtag:mini_st-link_v2e-front.jpg?0x100|}}
+{{:jtag:mini_st-link_v2e-back.jpg?0x100|}}
+Instead on an STM32F103, this dongle uses a [[http://www.cksic.com/en/|CKS]] [[http://www.cksmcu.com/cn/promcu-14.html|CKS32F103]] (sometimes CS32F103)  ({{ :jtag:ic_mcu_cks_cks32f103xb.pdf|chinese datasheet}}, {{ :jtag:ic_mcu_cks_cks32f103xb_en.pdf|datasheet translated to english}}).
+I've seen pin compatible alternatives (ST STM8S003 vs Nuvoton N76E003), even architecture compatible (ST STM32F103 vs GigeDevice GD32F103), but they always had some differences (architecture, electrical pin properties, registers, ...).
+The CS32F103 seems like a complete clone of the STM32F103 (exact same pinout, architecture, registers).
+So far I could not not see any difference (I tested flash, USB, SWD).
+I guess this micro-controller is so popular that it was just a question of time until it was ripped-off.
+To check if this is a complete clone you could decapsulate the chip and compare the silicon die, or check the errata behaviour (I can't imagine they re-implemented it themselves, up to the mistakes).
+The next step would be to have a CS32F103 chip in a package marked as STM32F103.
+== GC ==
+{{:jtag:stlink_gc_case.jpg?0x100|}}
+{{:jtag:stlink_gc_top.jpg?0x100|}}
+{{:jtag:stlink_gc_bottom.jpg?0x100|}}
+Most ST-LINK minis which I get now use the CKS32 chip.
+I'm a bit sad because the CS32F103C8 really only has the advertised 64 KB of flash, while the STM32F103C8 actually has 128 KB (e.g. what the STM32F103CB has), and when you have a lot of debugging strings in your firmware, you very soon reach the limit of the 64 KB.
+Thus, on my quest to find ST-LINK minis with STM32F103 (e.g. where the ground pin is not between SWDIO and SWCLK) I landed on this one.
+Sadly it also does not use a STM32F103, but a STM32GC102C8.
+I have no idea what this chip is.
+The GC series does not exist (at least ST doesn't mention it anywhere), and it predates the new G series.
+I'm not sure if this was to save cost, because this is the first board I see with 2 ESD protections (one for USB, the other for SWDIO/SWCLK in addition to the inline protection resistors, and none for RST/SWIM).
 ==== Baite ====
@@ Line 356: / Line 385: @@
 ==== PIC USB-Blaster ====
-This one uses a Microchip PIC18F14 micro-controller and has no buffer (thus only supporting 5 V signals).
+This one uses a Microchip PIC18F14 micro-controller (with embedded 3.3V LDO) and has no buffer (thus only supporting 3.3 V signals).
 {{:jtag:mini_pic_front.jpg?0x150|PIC USB-Blaster front}}
@@ Line 384: / Line 413: @@
 But v8 and v9 are not supported anymore by J-Link, meaning no new feature will be added to them.
 Instead I recommend to get the [[https://www.segger.com/products/debug-probes/j-link/models/j-link-edu/|J-Link EDU]] which is a supported v10 and not expensive.
+Here pictures from devices not from official distributors, thus they might not be genuine but only clones.
 They come in the same case:
@@ Line 407: / Line 438: @@
 Here a J-Link v10.
-This is currently the only version being developed on.
 It uses a NXP LPC4337 which supports USB high speed, and allows faster debugging speeds.
 In addition to the others, it adds cJTAG support:
@@ Line 413: / Line 443: @@
 {{:jtag:jlink-v10_board_top-mini.jpg?0x150|board front}}
 {{:jtag:jlink-v10_board_bottom-mini.jpg?0x150|board back}}
+Here a [[https://www.segger.com/products/debug-probes/j-link/models/j-link-ob/|J-Link OB]].
+It is supposed to be embedded on development board and provide an easy way to flash the main micro-controller.
+It have much less capabilities (no JTAG, only SWD, ...) and less protections, but is a lot smaller and sufficient for most tasks.
+Additionally it provides a UART interface, ideal for printf debugging.
+I actually can be implemented on several micro-controller, and in my case a STM32F072.
+{{:jtag:jlink-ob_front.jpg?0x150|board front}}
+{{:jtag:jlink-ob_back.jpg?0x150|board back}}
 ===== Texas Instruments XDS100v3 =====
@@ Line 425: / Line 466: @@
 ===== DISTORTEC JTAG-lock-pick Tiny 2 =====
-The [[http://www.distortec.com/jtag-lock-pick-tiny-2/|JTAG-lock-pick Tiny 2]] is just a very fast (using a FT232H chip), and compact (although it could be even more compact if the component were on both sides) JTAG adapter supporting 1.4V to 5.5V signals (using a CPLD), RTCK, SRST, and TRST.
+The [[http://www.distortec.com/jtag-lock-pick-tiny-2/|JTAG-lock-pick Tiny 2]] is just a very fast (using a FT232H chip), and compact (although it could be even more compact if the component were on both sides) JTAG adapter supporting 1.4V to 3.6V signals (5.5V tolerant), multiple pinouts possible (using a CPLD), RTCK, SRST, and TRST.
 {{:jtag:jtag-lockpick_front.jpg?0x150|board front}}