jtag
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
jtag [2017/04/13 12:10] – [Baite] add v2a kingkevin | jtag [2017/04/25 14:05] – [Baite] kingkevin | ||
---|---|---|---|
Line 82: | Line 82: | ||
One trick to get this ridiculously low price is to use STM32F101 micro-controllers. | One trick to get this ridiculously low price is to use STM32F101 micro-controllers. | ||
Compared to the STM32F103 micro-controllers they offer less functionalities, | Compared to the STM32F103 micro-controllers they offer less functionalities, | ||
- | Well this is because these micro-controllers use the same die, but if not all STM32F103 feature tests pass after production they get packages as STM32F101, | + | Well this is because these micro-controllers use the same die, but if not all STM32F103 feature tests pass after production they get packages as STM32F101, |
+ | At least this is my guess. | ||
+ | It would be interesting to check if the other STM32F103 peripherals normally not present on the STM32F101 work as well, but I wouldn' | ||
+ | After all, they are probably marked as STM32F101 for a good reason.\\ | ||
Similarly the STM32F103C8 is only rated having 64 kB of flash because it didn't pass the flash test, compared to the 128 kB for the STM32F103CB, | Similarly the STM32F103C8 is only rated having 64 kB of flash because it didn't pass the flash test, compared to the 128 kB for the STM32F103CB, | ||
Line 108: | Line 111: | ||
{{: | {{: | ||
- | From the outside this looks very similar to the previous one, except that the connector pinout is very different (except for power).\\ | + | From the outside this looks very similar to the previous one, except that the connector pinout is very different (except for power) |
No markings are on the board. | No markings are on the board. | ||
Line 132: | Line 135: | ||
{{: | {{: | ||
- | I've also reversed the board layout to get the {{:jtag:baite_schematic.pdf|schematic}}. | + | I've also reversed the board layout to get the {{:jtag:baite.pdf|schematic}}. |
The connector pins are all protected with 220 ohms resistors. | The connector pins are all protected with 220 ohms resistors. | ||
Line 138: | Line 141: | ||
{{: | {{: | ||
- | There is a newer version marked as " | + | There is a newer version marked as " |
* all pads for the micro-controller are present (there is even solder mask between them) | * all pads for the micro-controller are present (there is even solder mask between them) | ||
* they added a SWD port | * they added a SWD port |
jtag.txt · Last modified: 2024/01/07 17:49 by 127.0.0.1