The WLX896B operates on a single 5V DC input (typically via a micro-USB or a 2-pin JST). The exclusive detail here is the cascading LDO topology.
[5V Input] ---> [Diode D1 (SS34)] ---> [U1 (AMS1117)] ---> 3.3V Rail
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----> [U2 (RT9193)] ---> 1.8V Rail
Would you like help decoding a specific WLX896B marking or troubleshooting a board using one? If you share clear photos of the PCB and IC markings, I can help reverse-engineer the exact pinout for your case. wlx896b schematic exclusive
This is what you came for. The WLX896B has a 6-pin header (2x3, 1.27mm pitch) labeled "J4" but usually unpopulated. Our continuity analysis reveals: The WLX896B operates on a single 5V DC
| Pin | Signal | Voltage | Exclusive Use Case | | --- | ------ | ------- | ------------------- | | 1 | VCC (3.3V) | 3.3V | Power external debugger | | 2 | UART_TX | 3.3V | Boot log output (115200 baud) | | 3 | UART_RX | 3.3V | Firmware command injection | | 4 | SWD_IO | 3.3V | ARM Serial Wire Debug (if IC-A is ARM) | | 5 | SWD_CLK | 3.3V | Clock for debugging | | 6 | GND | 0V | Ground | [5V Input] ---> [Diode D1 (SS34)] ---> [U1
Exclusive finding: The WLX896B typically boots with a 5-second window where UART is active. After that, the pins are repurposed as GPIO. You need to attach your serial adapter before powering the board.