Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revisionNext revision | Previous revision |
| nokia_fygm [2023/03/16 14:58] – [UART Data] millerjs | nokia_fygm [2025/01/23 02:47] (current) – [Headers] 71.241.138.91 |
|---|
| If you wish to prevent the 8051 from operating at all, this can be done by holding its reset line low. This is easily achieved by adding a jumper across pins 7 and 9 (RST and GND) of J7. [[https://wiki.millerjs.org/lib/exe/detail.php?id=nokia_fygm&media=8051_reset.png|See here.]] A caveat of limiting the 8051's operation, however, is that the RS422 lines are not operational, as they as passed through the 8051. I don't know why that is, yet, but it's worth knowing. I'm looking into workarounds for this, and they will probably involve running the M8T's TxO and RxI directly to the RS422 transceivers. | If you wish to prevent the 8051 from operating at all, this can be done by holding its reset line low. This is easily achieved by adding a jumper across pins 7 and 9 (RST and GND) of J7. [[https://wiki.millerjs.org/lib/exe/detail.php?id=nokia_fygm&media=8051_reset.png|See here.]] A caveat of limiting the 8051's operation, however, is that the RS422 lines are not operational, as they as passed through the 8051. I don't know why that is, yet, but it's worth knowing. I'm looking into workarounds for this, and they will probably involve running the M8T's TxO and RxI directly to the RS422 transceivers. |
| ===== Headers ===== | ===== Headers ===== |
| The FYGM has three headers with which it can be interacted. Some boards have J3 and J7 populated, but not all. They use standard 0.1" pin pitch headers so it's trivial to add pins. Additionally, there is enough clearance to put the lid back on if these headers are installed, but there will probably not be enough room to have leads connected to them //and// put the lid back on. If you're suitably crazy, you can use standard M3 standoff extensions to get around this, [[https://ljck.org/lib/exe/detail.php?id=nokia_fygm&media=fygm_lifted_lid.png|like I did]]. | The FYGM has three headers with which it can be interacted. Some boards have J3 and J7 populated, but not all. They use standard 0.1" pin pitch headers so it's trivial to add pins. Additionally, there is enough clearance to put the lid back on if these headers are installed, but there will probably not be enough room to have leads connected to them //and// put the lid back on. If you're suitably crazy, you can use standard M3 standoff extensions to get around this, [[https://wiki.millerjs.org/lib/exe/detail.php?id=nokia_fygm&media=fygm_lifted_lid.png|like I did]]. |
| |
| == J2 == | == J2 == |
