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.

/*
 * This Verilog module encapsulates our secondary headset audio channel,
 * connected to Iota headset interface.
 */

module audio_hso (GND, Vio, HSMICBIAS, HSMICP, HSO, Detect);

input GND, Vio;
input HSO, HSMICBIAS;
output HSMICP, Detect;

/* internal wires */

wire EAR_jack, MIC_jack;

/* instantiate the jack */

trrs_jack jack (.T(GND),
		.R(MIC_jack),
		.R2(EAR_jack),
		.S(GND),
		.T_sw(Detect),
		.R_sw()		/* not used */
	);

/* output path */

capacitor HSO_cap (HSO, EAR_jack);

/* microphone input circuit */

capacitor C37 (HSMICBIAS, GND);
resistor R19 (HSMICBIAS, MIC_jack);

capacitor C38 (MIC_jack, GND);

capacitor C23 (MIC_jack, HSMICP);
capacitor C22 (HSMICP, GND);

/* Detect pull-up resistor */

resistor Detect_pullup (Detect, Vio);

endmodule