This page lists and describes the purposes of the testpoints accessible on a 3DS's circuit board.

Old 3DS

The signals were figured out using a PicoScope 2206B running at 20 MS/s, ±5 V, 8-bit, 1:10, DC.

TP Net Name U[V] A/O/S (1) A/D/P/G|PP/OC/PU/PD|R/T (2) Domain f[Hz] Description
TP1 GND A Charger -
TP2 +1.2V 1.2V O P ? -
..
TP4 Uchrg 5V A P Charger -
..
TP7 +1.8V 1.8V A P ? -
TP8 Ubat 3.5V-3.8V A P Battery -
..
TP10 +1.8V 1.8V A P ? -
TP11 +1.8V 1.8V A P ? -
TP12 +3.5V 3.8V O P ? -
..
TP41 AMP-REF-BOTSCR 0.2V S P ? -
TP42 AMP-REF-BOTSCR? 10V S P ? -
..
TP46 Enable? Supply? 3.2V S PP? P? ? - High when displays are active but low during boot
..
TP80 START 1.8V O PU ? -
TP81 SELECT 1.8V O PU ? -
TP82? HOME? 1.8V? O? PU? ? -
..
TP85 DPAD-U 1.8V O PU ? -
TP86 X 1.8V O PU ? -
TP87 DPAD-L 1.8V O PU ? -
TP88 Y 1.8V O PU ? -
TP89 A 1.8V O PU ? -
TP90 DPAD-R 1.8V O PU ? -
TP91 DPAD-D 1.8V O PU ? -
TP92 B 1.8V O PU ? -
..
TP131 (TOP-?)SCREEN-PWM 1.8V S D ? 1166.7kHz
TP132 (BOT-?)SCREEN-PWM 1.8V S D ? 1166.7kHz
..
TP189 VIDEO-CLK 1.8Vp S D+T ? 11.1MHz
Tp190 VIDEO-HSYNC 1.8Vp S D+R ? -
TP191 VIDEO-VSYNC 1.8Vp S D+R ? -
..
TP213 TOUCH-R-X? 0V-2Vp O A+R ?
TP214 TOUCH-T-Y? 2Vp O D?+R ?
TP215 TOUCH-R-Y? 2Vp O D?+R ?
TP216 TOUCH-T-X? 0V-2Vp O A+R ?
..
TP249 NAND-DAT0
TP250 NAND-DAT1
TP251 NAND-DAT2
TP252 NAND-DAT3
TP253 NAND-CMD
TP254? NAND-CLK?

[1] Presence: A = Always; O = Device On; S = Not during standby.

[2] Electrical characteristics: Signal Type: A = Analogue; D = Digital; P = Power; G = Ground; Driver: PP = Push Pull; OC = Open Collector; PU/PD = Pull Up/Down Typical Waveforms: R = Rectangular; T = Triangular;