FreeCalypso > hg > freecalypso-schem2
comparison venus/src/MCL @ 70:8bc2aa52fd23
manual RESET button new part: 260 g force, shorter actuator
One of the main envisioned use cases for FC Venus is field demonstration:
the board will be carried around, mounted on a sheet of acrylic or somesuch,
it will have a battery and an antenna connected, there will be a test SIM
with active service inserted, and the setup will be ready to demonstrate
as a working phone at a moment's notice. But when a demo is not actively
in progress, the fully assembled setup will be transported around in a big
and loose ESD bag, and it will need to be equivalent to a traditional phone
in its switched-off state: battery present, RTC keeping time, but not
switched on all the time.
Having a RESET button of the same keyswitch type as used for the regular
keypad and PWON would cause a problem for such field transport scenarios:
any spurious press of this button would cause a "misc boot" switch-on.
Short spurious presses of PWON are filtered out by the firmware (automatic
power-off if the button isn't held down long enough), but the same cannot
be done for super-low-level nTESTRESET. However, a button with significantly
greater operating force and a shorter actuator (not sticking out to the same
height as the regular keypad buttons) should be much safer.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 02 Dec 2021 22:40:39 +0000 |
parents | de44df15cf05 |
children | 86f94899bfa3 |
comparison
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69:de44df15cf05 | 70:8bc2aa52fd23 |
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1360 # Switches | 1360 # Switches |
1361 | 1361 |
1362 part keypad-switch: | 1362 part keypad-switch: |
1363 manufacturer=E-Switch | 1363 manufacturer=E-Switch |
1364 manufacturer_part_number=TL3301EF160QJ | 1364 manufacturer_part_number=TL3301EF160QJ |
1365 description=Tactile switch, SMT J-lead, 160 g force | 1365 description=Tactile switch, SMT J-lead, 160 g force, 7.3 mm height |
1366 vendor=Digi-Key | 1366 vendor=Digi-Key |
1367 vendor_part_number=TL3301EF160QJCT-ND | 1367 vendor_part_number=TL3301EF160QJCT-ND |
1368 npins=4 | 1368 npins=4 |
1369 | 1369 |
1370 S401: | 1370 S401: |
1463 part=keypad-switch | 1463 part=keypad-switch |
1464 hier=mob.keypad.S424.pkg | 1464 hier=mob.keypad.S424.pkg |
1465 | 1465 |
1466 # RESET button | 1466 # RESET button |
1467 S425: | 1467 S425: |
1468 part=keypad-switch | |
1469 hier=mob.reset_sw.pkg | 1468 hier=mob.reset_sw.pkg |
1469 manufacturer=E-Switch | |
1470 manufacturer_part_number=TL3301AF260QJ | |
1471 description=Tactile switch, SMT J-lead, 260 g force, 5.0 mm height | |
1472 vendor=Digi-Key | |
1473 vendor_part_number=EG6035CT-ND | |
1474 npins=4 | |
1470 | 1475 |
1471 # charging power slide switch | 1476 # charging power slide switch |
1472 S701: | 1477 S701: |
1473 hier=chg_switch | 1478 hier=chg_switch |
1474 manufacturer=C&K | 1479 manufacturer=C&K |