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 least at 2 MS/s, ±5 V, 8-bit, 1:10, DC. All measures of digital signals were referenced by the square GND pad at the bottom left corner.
| TP | Net Name | U[V] | S/O/A/R (1) | A/D/P/G|C/OC|R/T (2) | Domain | f[Hz] | Description |
|---|---|---|---|---|---|---|---|
| TP1 | GND | 0V | S | G | Charger | - | |
| TP2 | +1.2V | 1.2V | O | P | ? | - | |
| TP3 | +2.8V | 2.8V | O | P | ? | - | |
| TP4 | Uchrg | 3V - 5V | S | P | Charger Port | - | |
| TP5 | +1.8V | 1.8V | O | P | ? | - | |
| TP6 | +2.8V | 2.8V | O | P | ? | - | |
| TP7 | +1.8V | 1.8V | S | P | ? | - | |
| TP8 | Ubat | 3.5V - 3.8V | S | P | Battery | - | |
| TP9 | +3.9V | 3.6V - 3.9V | S | P | ? | - | 3.9V when off, around 3.6V when active |
| TP10 | +1.8V | 1.8V | S | P | ? | - | |
| TP11 | +1.8V | 1.8V | S | P | ? | - | |
| TP12 | +4V | 3.7V - 4V | O | P | ? | - | 4V during standby, around 3.75V when active |
| .. | |||||||
| TP41 | Bot Screen Lights Source | 10V | A | P | ? | - | |
| TP42 | Bot Screen Lights Sink | 0.2V | A | P | ? | - | |
| .. | |||||||
| TP46 | Enable? Supply? | 3.2V | A | PP?P? | ? | - | High when displays are active but low during boot |
| .. | |||||||
| TP48 | HEADPHONE-GND | 2.2Vpp | O? | G | headphone | ~ 33kHz | Headphone ground |
| TP49 | HEADPHONE-PD | 1V | O | OC | headphone | - | headphone Plug Detection |
| TP50 | HEADPHONE-LEFT | 2.2Vpp | A | A+PP | headphone | referenced to TP48, AC | |
| TP51 | HEADPHONE-RIGHT | 2.2Vpp | A | A+PP | headphone | referenced to TP48, AC | |
| .. | |||||||
| TP58 | WLAN button | 1.8V | O | OC | side buttons | - | |
| .. | |||||||
| TP67 | SYS-LED-BLUE-LowsideDriver | 2.2V - 3V | O | P+T | leds | 0Hz, 2kHz | Static when active, PWM when in standby |
| TP68 | JPAD-Y | 0.2V - 1.5V | A | A | circle pad | - | Voltage U > D |
| TP69 | JPAD-X | 0.2V - 1.5V | A | A | circle pad | - | Voltage L > R |
| TP70 | SYS-LED-RED-LowsideDriver | (2.2V - 3V)? | ? | P+T | leds | ? | |
| .. | |||||||
| TP80 | START | 1.8V | O | OC | main buttons | - | |
| TP81 | SELECT | 1.8V | O | OC | main buttons | - | |
| TP82 | R | 1.8V | O | OC | main buttons | - | |
| TP83 | L | 1.8V | O | OC | main buttons | - | |
| TP84 | +1.8V | 1.8V | O | P? | ? | - | perhaps voltage rail for buttons? |
| TP85 | DPAD-U | 1.8V | O | OC | main buttons | - | |
| TP86 | X | 1.8V | O | OC | main buttons | - | |
| TP87 | DPAD-L | 1.8V | O | OC | main buttons | - | |
| TP88 | Y | 1.8V | O | OC | main buttons | - | |
| TP89 | A | 1.8V | O | OC | main buttons | - | |
| TP90 | DPAD-R | 1.8V | O | OC | main buttons | - | |
| TP91 | DPAD-D | 1.8V | O | OC | main buttons | - | |
| TP92 | B | 1.8V | O | OC | main buttons | - | |
| TP93 | ? | 0V | S | G? D? A? | ? | - | |
| TP94 | ? | 0V | S | G? D? A? | ? | - | |
| .. | |||||||
| TP96 | +3.2V | 3.2V | O | P? | ? | - | |
| .. | |||||||
| TP131 | TOP-SCREEN-PWM | 1.8V | A | D | ? | 1166.7kHz | 2.7% (darkest) - 25% (brightest) dutycycle |
| TP132 | BOT-SCREEN-PWM | 1.8V | A | D | ? | 1166.7kHz | 5% (darkest) - 54% (brightest) dutycycle |
| .. | |||||||
| TP144 | IR-I2C-SCL | 3.2Vp | R | OC | ir-i2c | 390kHz | Address: 9Ah (W), 9Bh (R) |
| .. | |||||||
| TP146 | IR-I2C-SDA | 3.2Vp | R | OC | ir-i2c | 390kHz | |
| .. | |||||||
| TP149 | ? | 2Vp | A | C?+R | ? | 47.6kHz | I2S word select? |
| TP150 | ? | 2Vp | A | C?+R | ? | 1.52MHz | I2S clock? |
| .. | |||||||
| TP152 | ? | 1.8Vp | A | D | ? | 16.7MHz | clock? |
| .. | |||||||
| TP189 | VIDEO-CLK | 1.8Vp | A | D+T | video signal | 11.1MHz | at home screen |
| TP190 | VIDEO-HSYNC | 1.8Vp | A | D+R | video signal | 24.77kHz | at home screen |
| TP191 | VIDEO-VSYNC | 1.8Vp | A | D+R | video signal | 59.8Hz ~60 | at home screen |
| .. | |||||||
| TP213 | TOUCH-Y? | 2V, 2Vp | O | D, D+R | touch | ||
| TP214 | TOUCH-X? | 0V, 2Vp | O | A, A+R | touch | ||
| TP215 | TOUCH-Y? | 2V, 2Vp | O | D, D+R | touch | ||
| TP216 | TOUCH-X? | 0V, 2Vp | O | A, A+R | touch | ||
| .. | |||||||
| TP249 | NAND-DAT0 | O? | PP? | nand | |||
| TP250 | NAND-DAT1 | O? | PP? | nand | |||
| TP251 | NAND-DAT2 | O? | PP? | nand | |||
| TP252 | NAND-DAT3 | O? | PP? | nand | |||
| TP253 | NAND-CMD | O? | PP? | nand | |||
| TP254? | NAND-CLK? | O? | PP? | nand |
[1] Presence: S = Static (always present); O = device On; A = Active (not in standby); R = when Required.
[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;