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Test points

The Gamepad's motherboard features many test points.

TODO: make a picture with the test points labelled, maybe interactive

The following test points have been identified so far:

Test point	Description
TP28	DRC I2C - SDA
TP29	DRC I2C - SCL
TP36	SPI - MISO
TP37	SPI - MOSI
TP38	SPI - CLK
TP39	SPI - UIC CS
TP40	SPI - FLASH CS
TP41	UIC I2C - SDA
TP42	UIC I2C - SCL
TP43	Reset for DRC and SPI FLASH (simple reset circuit)
TP48	UIC pin 62
TP57	UIC pin 63
TP64	B Button
TP65	X Button
TP70	A Button
TP71	Y Button
TP77	FLASH WP
TP85	Power Button
TP103	L3
TP118	VBUS
TP119	VBUS GND
TP121	VBAT
TP125	GND
TP128	GND
TP152	POWER Button
TP153	HOME Button
TP161	To Q103 on Sub-Board 1 (LED_B/Power LED..?)
TP162	LED_R (Low Battery)
TP163	LED_O (Charge)
TP164	TV Button
TP227	Vcc (2.8V - SoC, FLASH, …)
TP229	UART boot (to serial header pad 2)
TP230	SoC pad N2 (to ground through R133)
TP231	UART1 TX (to serial header pad 3)
TP233	UIC RST
TP234	UIC SWIM
TP236	Serial header pad 4 - Vcc (2.8V)
TP237	Serial header pad 2 - UART boot
TP238	Serial header pad 3 - UART1 TX
TP239	Serial header pad 1 - UART1 RX

Other points of interest:

Marking	Description
R4	Audio amplifier clock input (16 MHz)
R6	Audio amplifier bit clock output (3.08 MHz)
R7	Audio amplifier sample clock output (48 KHz)
R8	Audio amplifier data input (audio output, I2S)
R10	Audio amplifier data output (mic input, I2S?)

Serial header

The pins under the battery connector are a serial header connected to UART1.

Pin	Description
1	RX
2	UART boot enable (short to ground to enable)
3	TX
4	Vcc (2.8V)