view venus/src/core/rfmatch_fem2rita_pcs.v @ 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 3ed0f7a9c489
children
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/* RF Rx path from quadband FEM to Rita, PCS band, per Leonardo schematics */

module rfmatch_fem2rita_pcs (In_neg, In_pos, Out_neg, Out_pos);

input In_neg, In_pos;
output Out_neg, Out_pos;

inductor L604 (In_neg, In_pos);

capacitor C624 (In_neg, Out_neg);
capacitor C625 (In_pos, Out_pos);

endmodule