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: