Differences
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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boards:mt128 [2022/11/11 12:58] darron [Olimex AVR MT128] |
boards:mt128 [2022/11/21 19:06] (current) darron |
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| Plugging this board into a usbtiny or usbasp connected to a RPi | Plugging this board into a usbtiny or usbasp connected to a RPi | ||
| - | has the tendency to crash the Pi due to inrush current | + | may crash the Pi due to inrush current. It |
| + | is sensible to utilise a programmer which can disable (or not supply) target power and power this board using its AC input. | ||
| + | |||
| + | ===Test=== | ||
| + | |||
| + | < | ||
| + | avrdude -c usbtiny -p m128 | ||
| + | |||
| + | avrdude: AVR device initialized and ready to accept instructions | ||
| + | |||
| + | Reading | ################################################## | ||
| + | |||
| + | avrdude: Device signature = 0x1e9702 (probably m128) | ||
| + | |||
| + | avrdude: safemode: Fuses OK (E:FF, H:09, L:CF) | ||
| + | |||
| + | avrdude done. Thank you. | ||
| + | </ | ||
| + | |||
| + | ===Pinout=== | ||
| + | |||
| + | ==JTAG== | ||
| + | |||
| + | __Male socket__ | ||
| + | < | ||
| + | 1 TCK 2 GND | ||
| + | 3 TDO 4 5V | ||
| + | K 5 TMS 6 RESET | ||
| + | 7 5V 8 NC | ||
| + | 9 TDI 10 GND | ||
| + | </ | ||
| + | |||
| + | __Female plug__ | ||
| + | < | ||
| + | 2 GND 1 TCK | ||
| + | 4 5V 3 TDO | ||
| + | 6 RESET 5 TMS K | ||
| + | 8 NC 7 5V | ||
| + | 10 GND 9 TDI | ||
| + | </ | ||
| + | |||
| + | K=KEY | ||
| + | |||
| + | ==ISP== | ||
| + | |||
| + | __Male socket__ | ||
| + | |||
| + | < | ||
| + | 1 MOSI 2 5V | ||
| + | 3 NC 4 GND | ||
| + | K 5 RST 6 GND | ||
| + | 7 SCK 8 GND | ||
| + | 9 MISO 10 GND | ||
| + | </ | ||
| + | |||
| + | K=KEY | ||
| + | |||
| + | ==RS-232== | ||
| + | |||
| + | __DB9 female socket__ | ||
| + | |||
| + | < | ||
| + | 5 3 3 2 1 | ||
| + | 9 8 7 6 | ||
| + | </ | ||
| + | |||
| + | < | ||
| + | 1 NC | ||
| + | 2 TXD | ||
| + | 3 RXD | ||
| + | 4 NC | ||
| + | 5 GND | ||
| + | 6 NC | ||
| + | 7 NC | ||
| + | 8 NC | ||
| + | 9 NC | ||
| + | </ | ||
| ===Resources=== | ===Resources=== | ||
| Line 16: | Line 92: | ||
| [[https:// | [[https:// | ||
| + | |||
| + | [[https:// | ||
| + | |||
| + | [[https:// | ||
