Talk:Teensy++ 2.0

Teensy talk

NANDway

• Solder 3.3V regulator on Teensy (and cut 5V pad)
• Flash the HEX to the Teensy
• Solder all control + I/O wires + Ground
• Crash it (it will beep and blink red led), press power button to have a solid red led
• Make sure to use the right nand id for nandway.py
• Dump it

Notes

<judges> nand powered with 3.3v by atx doesnt work
<judges> nand powered by teensy requires huge delays to work kind of reliable
<judges> teensy powered by usb, nand powered by external psu with 2v works like a charm..
<judges> thats why nandway worked for me.. it's slow. my own version is almost twice as fast and only worked on my first nand. second one always gave errors..
<judges> powered by teensy seems to be right on the edge of whats still working
<judges> but only with 10ms delays between page reads..
<judges> current power draw is 1.13amps at 2v
<judges> nand control lines are pulled high by starship and teensy isnt able to pull them low
<judges> 2v-2.5v works fine
<judges> stops working at 2.8v

<judges> it seems to be kind of variable.. <@eussNL> 1.5Amps at 2.5V is more than enough, right judges ?
<judges> using my version of nandway you'll need [email protected]
<judges> using the original one you'll need [email protected]
<judges> my version drives i/o lines differently
<judges> also original doesnt even work at 2.5V

2.5V 1.5A regulators

• http://www.ti.com/lit/ds/symlink/lm1086.pdf
• http://www.ti.com/lit/ds/symlink/tps75325.pdf
• http://cds.linear.com/docs/en/datasheet/3015fb.pdf
• http://www.onsemi.com/pub_link/Collateral/NCP59150-D.PDF
• http://docs-europe.electrocomponents.com/webdocs/0f82/0900766b80f82671.pdf