The Nordic Thingy:53™ has several test points that can be useful during development and debugging.
The following table describes the test points.
| Test point | Location | Signal | Description |
|---|---|---|---|
| TP1 | Top | SCK | Serial Peripheral Interface (SPI) clock line. |
| TP2 | MOSI | SPI MOSI line. | |
| TP3 | MISO | SPI MISO line. | |
| TP4 | SDA | Inter-integrated Circuit (I2C) SDA line. | |
| TP5 | SCL | I2C SCL line. | |
| TP6 | Bottom | ADXL362 CS | ADXL362 chip select pin. |
| TP7 | BMI270 CS | BMI270 chip select pin. | |
| TP8 | BMM150 INT | BMM150 interrupt pin. | |
| TP9 | Top | SWDIO | Serial Wire Debug (SWD) I/O line. |
| TP10 | SWDCLK | SWD clock line. | |
| TP11 | RESET | nRF5340 System on Chip (SoC) reset line. | |
| TP12 | VOUTB’ | VOUTB voltage before the power switch. | |
| TP13 | VOUTB | VOUTB voltage after the power switch. | |
| TP14 | VSYS’ | VSYS voltage before the power switch. | |
| TP15 | VSYS | VSYS voltage after the power switch. | |
| TP16 | V_Bat | Battery voltage. Output of load switch U4. | |
| TP17 | Ground | Ground at battery connector (J3). | |
| TP18 | VBUS’ | VBUS voltage before low pass filter. | |
| TP19 | D- | Universal Serial Bus (USB) D- line. | |
| TP20 | D+ | USB D+ line. | |
| TP21 | GND | Ground at USB connector (J6). | |
| TP22 | LOAD_SW_DISABLE | Load switch disable line. | |
| TP23 | CSN | nRF21540 RF FEM chip select line. | |
| TP24 | VDD_nRF53 | nRF5340 supply voltage. Output of load switch U5. | |
| TP25 | VDD_nRF21540 | nRF21540 RF FEM supply voltage. Output of load switch U11. | |
| TP26 | VDD_EXP_BOARD | Expansion board supply voltage. Output of load switch U14. | |
| TP27 | DIN | Pulse Density Modulation (PDM) data in line. | |
| TP28 | CLK | PDM clock line. | |
| TP29 | DOUT | VM3011 DOUT pin. | |
| TP30 | ISET | nPM1100 Power Management Integrated Circuit (PMIC) ISET pin. | |
| TP31 | MODE | nPM1100 PMIC MODE pin. | |
| TP32 | ERR | nPM1100 PMIC charging error indication pin. | |
| TP33 | CHG | nPM1100 PMIC charging indication pin. | |
| TP34 | ADXL362_INT1 | ADXL362 interrupt pin 1. | |
| TP35 | BMI270_INT1 | BMI270 interrupt pin 1. | |
| TP36 | BH_INT | BH1749NUC interrupt pin. | |
| TP37 | SHPACT | nPM1100 PMIC shipping mode hold pin. | |
| TP38 | SHPHLD | nPM1100 PMIC shipping mode activate pin. | |
| TP39 | RX_EN | nRF21540 RF FEM RX enable pin. | |
| TP40 | MODE | nRF21540 RF FEM mode pin. | |
| TP41 | SEL | Antenna selection pin. | |
| TP42 | TX_EN | nRF21540 RF FEM TX enable pin. | |
| TP43 | CSN | nRF21540 RF FEM antenna selection pin. | |
| TP44 | VLi-ion | Battery voltage at battery connector (J3). | |
| TP45 | ASDA | BMI270 auxiliary I2C SDA pin. | |
| TP46 | ASCL | BMI270 auxiliary I2C SCL pin. | |
| TP47 | SENS_PWR_CTRL | Sensor power control pin connected to U19 CTRL pin. |