Base Board Introduction
Product Overview
The A8550PZ1-132 motherboard (APX8550) is a high-performance embedded motherboard based on the Qualcomm QCS8550 flagship SoC, featuring a hexa-core (octa-core optional) Kryo CPU, Adreno 740 GPU, 48 TOPS NPU, 8K VPU, and Spectra ISP. The motherboard supports dual Gigabit RJ45 Ethernet ports, USB 3.0 Type-A, and extended USB 2.0 connectors, along with MIPI DSI/CSI, HDMI, LVDS, and eDP display interfaces. It also supports multiple SPI, I2C, RS485, UART, I2S, CAN, and GPIO general-purpose bus interfaces.
An onboard WiFi 6 + BT 5.3 module, a standard Mini-PCIe interface supporting 4G communication expansion, a Micro SD card slot for external storage expansion, and audio input/output interfaces are included. Purpose-built for high-compute, high-stability scenarios such as robotics, industrial AI, and high-end IPC/VR applications.
Product Appearance
A8550PZ1-132 motherboard physical photo: 
Interface Diagram
Physical Dimensions
| Item | Parameter |
|---|---|
| PCBA Dimensions | 135 mm × 90 mm (±0.5 mm) |
| Board Thickness | 1.6 mm (±10%) |
| Mounting Hole Diameter | 6 mm |
| Screw Hole Spec | ∮3.2 mm × 4 (±10%) |
| Overall Dimensions (with components) | 135 mm × 90 mm × 14 mm, PCB top-side height 9 mm |
For detailed dimensional information, contact APLUX FAE at support@aidlux.com.
Specifications
| Category | Description |
|---|---|
| CPU | QCS8550, 1× Prime Core + 2× Gold Core (4× optional) + 3× Silver Core, max 3.2 GHz |
| DDR | LPDDR5x 12 GB (8 GB / 12 GB / 16 GB / 24 GB optional) |
| Storage | 128 GB UFS 3.1 standard, expandable up to 512 GB |
| TF Card | Push-push TF card slot, up to 256 GB |
| USB | 2× Type-A (USB 3.0 ×2), 4× internal 1.25 mm vertical connectors (USB 2.0 ×4), 4× 2.0 mm horizontal connectors (USB 2.0 ×4) |
| HDMI | Standard HDMI display interface, supports 4K@60 Hz output |
| eDP | Industry-standard 30-pin eDP connector |
| LVDS | 30-pin industry-standard dual-channel LVDS interface, supports VESA/JEITA formats, up to 1080p output |
| Backlight Control | Industry-standard LCD backlight control interface (LVDS and eDP), supports backlight on/off and brightness adjustment |
| Camera | 2× MIPI CSI × 4-lane |
| I2S | 1× I2S interface, supports low-power voice processing and audiophile-quality playback (4 microphones) |
| Ethernet | 2× 10/100/1000M auto-negotiation RJ45 ports |
| Mini-PCIe | Industry-standard m-PCIe 4G module interface |
| SIM Card | Push-push Nano SIM card slot, supports mobile communications |
| CAN | 2× CAN header interfaces |
| Headphone/Mic | CTIA-standard 4-pole headset 3.5 mm jack (L-R-GND-MIC) |
| I2C | I2C headers and FPC interfaces (shared with SPI), supports I2C touch expansion |
| SPI | 2× independent SPI header interfaces, 1× shared with I2C |
| GPIO | Supports external expansion of 10× 1.8 V GPIO |
| Serial Communication | 2× RS485 + 6× UART |
| Buttons | Flash key (RECOVERY) + Power key |
| Power Input | Supports 10–24 V wide-voltage DC input |
| Debug Interface | Supports external 3.3 V serial debug |
| Line Out | Standard L/R channel line output (header interface + headphone jack) |
| WiFi / Bluetooth | Onboard WiFi 6 + BT 5.3 |
| Environmental | Operating temperature -25°C ~ +50°C, operating humidity 0%–95% (non-condensing) |
| OS | Android 15 / Ubuntu 22.04 |
Functions & Interface Definitions
USB 2.0 Interfaces (J8 / J9 / J10 / J11)
J8, J9, J10, and J11 are all USB 2.0 HOST interfaces, derived from the PCIe-to-USB chip uPD720201K8. Each interface has an independent load switch with 1.2 A load capacity. The connector type is 1×4×2.0 mm with latch, manufacturer: TXGA, model: FWF20029-S04B25NAM.
Pin Definition:
| Pin# | Definition | Note |
|---|---|---|
| 1 | 5V | 5 V output |
| 2 | DM | USB differential data - |
| 3 | DP | USB differential data + |
| 4 | GND | Digital ground |
USB 2.0 Interfaces (J12 / J13 / J14 / J15)
J12, J13, J14, and J15 are all USB 2.0 HOST interfaces, derived through the USB HUB chip FE1.1, therefore sharing 480 Mbps bandwidth. J12 and J13 share one load switch, and J14 and J15 share another load switch. The maximum load capacity per pair is 1.2 A. The connector type is 1×4×1.25 mm with latch, manufacturer: XUNPU, model: WAFER-GH1.25-4PLB.
Pin Definition:
| Pin# | Definition | Note |
|---|---|---|
| 1 | 5V | 5 V output |
| 2 | DM | USB differential data - |
| 3 | DP | USB differential data + |
| 4 | GND | Digital ground |
eDP Connector (J18)
[J18] Standard eDP connector (1×30×0.5 mm), supports eDP v1.4 standard. The connector is a bottom-contact, drawer-type FPC connector. Manufacturer: Jushuo Electronics, model: AFC07-S30FCC-00.
Pin Definition:
| Pin# | Definition | Note |
|---|---|---|
| 1 | NC | NC |
| 2 | GND | Digital ground |
| 3 | D1- | Data differential signal |
| 4 | D1+ | Data differential signal |
| 5 | GND | Digital ground |
| 6 | D0- | Data differential signal |
| 7 | D0+ | Data differential signal |
| 8 | GND | Digital ground |
| 9 | AUX+ | Auxiliary differential signal |
| 10 | AUX- | Auxiliary differential signal |
| 11 | GND | Digital ground |
| 12 | LCD_3V3 | LCD_3V3 power output |
| 13 | LCD_3V3 | LCD_3V3 power output |
| 14 | NC | NC |
| 15 | GND | Digital ground |
| 16 | GND | Digital ground |
| 17 | ETX_HPD | Hot-plug detect signal |
| 18 | GND | Digital ground |
| 19 | GND | Digital ground |
| 20 | GND | Digital ground |
| 21 | GND | Digital ground |
| 22 | BL_EN | Backlight enable signal |
| 23 | BL_PWM | PWM control signal |
| 24 | NC | NC |
| 25 | NC | NC |
| 26 | BL_12V | BL_12V power output |
| 27 | BL_12V | BL_12V power output |
| 28 | BL_12V | BL_12V power output |
| 29 | BL_12V | BL_12V power output |
| 30 | NC | NC |
Backlight Connector (J20)
[J20] Backlight connector (1×6×2.0 mm), provides 12 V backlight power. If the backlight power exceeds 20 W, it is recommended to use a separate backlight power board (12 V adapter powered directly by the adapter; 24 V adapter requires adjusting the onboard power supply). Supports PWM backlight control and backlight on/off. Connector manufacturer: Bossie, model: BX-PH2.0-6PWZ-R.
Pin Definition:
| Pin# | Definition | Note |
|---|---|---|
| 1 | GND | Digital ground |
| 2 | GND | Digital ground |
| 3 | PWM | PWM control signal |
| 4 | BL_ON/OFF | Backlight on/off signal |
| 5 | BL_12V | 12 V power output |
| 6 | BL_12V | 12 V power output |
Camera Connectors (J22 / J23)
J22 and J23 are camera connectors with identical signal definitions. Both support MIPI 4-Lane CSI with a maximum of 2.5 Gbps per lane. The connector type is 1×22×0.5 mm single-row drawer-type FPC connector. Manufacturer: Huade Gongchuang, model: 0.5K-A-22PB.
Pin Definition:
| Pin# | Definition | Note |
|---|---|---|
| 1 | GND | Digital ground |
| 2 | LN0_M | Data differential signal |
| 3 | LN0_P | Data differential signal |
| 4 | GND | Digital ground |
| 5 | LN1_M | Data differential signal |
| 6 | LN1_P | Data differential signal |
| 7 | GND | Digital ground |
| 8 | CLK_M | Clock differential signal |
| 9 | CLK_P | Clock differential signal |
| 10 | GND | Digital ground |
| 11 | LN2_M | Data differential signal |
| 12 | LN2_P | Data differential signal |
| 13 | GND | Digital ground |
| 14 | LN3_M | Data differential signal |
| 15 | LN3_P | Data differential signal |
| 16 | GND | Digital ground |
| 17 | RST | Reset signal |
| 18 | LED | LED indicator signal |
| 19 | GND | Digital ground |
| 20 | SCL | I2C bus clock signal |
| 21 | SDA | I2C bus data signal |
| 22 | CAM_3V3 | 3.3 V power output |
CAN Connectors (J27 / J28)
J27 and J28 are CAN connectors with identical signal definitions. Both support CAN 2.0B and CAN FD. The connector type is 1×3×2.5 mm. Manufacturer: TXGA, model: FWF25029-S03S25W5M.
Pin Definition:
| Pin# | Definition | Note |
|---|---|---|
| 1 | H | Data |
| 2 | L | Data |
| 3 | VSS | CAN shield ground |
RS485 Interfaces (J37 / J38)
[J37] and [J38] are RS485 interfaces (1×4×1.25 mm) with identical signal definitions. Both have onboard 120 Ω termination resistors. Connector manufacturer: XUNPU, model: WAFER-GH1.25-4PLB.
Signal Definition:
| Pin# | Definition | Note |
|---|---|---|
| 1 | VCC | 3.3 V power output |
| 2 | B | Differential signal |
| 3 | A | Differential signal |
| 4 | VSS | RS485 shield ground |
Important Notes
Please observe the following key notes when assembling and using the APX8550 motherboard:
- Environmental requirements: Relative humidity 0–95% non-condensing, operating temperature -25°C ~ +50°C, storage temperature -40°C ~ +85°C.
- ESD protection: ESD precautions must be taken during product assembly and transportation.
- Cable lengths: Interface cables connected to this board should not be excessively long, as this may affect signal quality.
- Mechanical stress: Do not allow the board to be twisted or subjected to heavy pressure that could cause deformation during product assembly.
- Short circuit prevention: Prevent short circuits between the bare board and other peripherals.
- LCD panel connection: When connecting an external LVDS or eDP LCD panel, verify that the panel drive voltage and current meet the requirements, and note the pin 1 orientation of the panel cable connector.
- Backlight power: When connecting an external LVDS or eDP LCD panel, verify that the backlight voltage and current meet the requirements. If the LCD backlight power exceeds 20 W, using a separate power board for backlight power is recommended.
- Peripheral IO levels and current: When connecting external devices to interfaces (USB, GPIO, serial, I2C, SPI, HDMI, etc.), verify that the peripheral's IO levels and current meet the requirements. When using the power pins on the motherboard connectors to supply power to peripherals, the current on regular power pins must not exceed 100 mA. When connecting peripherals via serial ports, voltage level matching is also required (1.8 V, 3.3 V TTL, and RS-485 levels).
Document Information
- Official product name: A8550PZ1-132 Motherboard
- Full product code: A8550PZ1-132
- Document version: V1.0
- Release date: 2026-06-11
- Classification: Public
- Applicable scope: A8550PZ1-132 motherboard and product integration projects based on this hardware platform
© 2026 Chengdu APLUX Intelligence Technology Ltd. Unauthorized reproduction, distribution, or use beyond the scope specified in this document is prohibited without written permission.