FreeCalypso > hg > freecalypso-schem2
changeset 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> |
---|---|
date | Thu, 02 Dec 2021 22:40:39 +0000 |
parents | de44df15cf05 |
children | 86f94899bfa3 |
files | venus/src/MCL |
diffstat | 1 files changed, 7 insertions(+), 2 deletions(-) [+] |
line wrap: on
line diff
--- a/venus/src/MCL Thu Dec 02 07:20:13 2021 +0000 +++ b/venus/src/MCL Thu Dec 02 22:40:39 2021 +0000 @@ -1362,7 +1362,7 @@ part keypad-switch: manufacturer=E-Switch manufacturer_part_number=TL3301EF160QJ - description=Tactile switch, SMT J-lead, 160 g force + description=Tactile switch, SMT J-lead, 160 g force, 7.3 mm height vendor=Digi-Key vendor_part_number=TL3301EF160QJCT-ND npins=4 @@ -1465,8 +1465,13 @@ # RESET button S425: - part=keypad-switch hier=mob.reset_sw.pkg + manufacturer=E-Switch + manufacturer_part_number=TL3301AF260QJ + description=Tactile switch, SMT J-lead, 260 g force, 5.0 mm height + vendor=Digi-Key + vendor_part_number=EG6035CT-ND + npins=4 # charging power slide switch S701: