Always refer to the latest official BK2461 datasheet before finalizing your design, as specifications and application notes may be updated.
| Pin | Name | The Cool Trick | | :--- | :--- | :--- | | | GPIO / PWM | Drive an LED or a servo directly. No extra chip. | | 5 | ANT | The output. Crucial: This needs a matching network. You can't just attach a wire. | | 9 | DVDD12 | The 1.2V core decoupling. Touch this with a short circuit and cry. Use a 1uF cap. | | 10 | AVDD | Analog power (2.2V - 3.6V). | | 13 | XIN | 16 MHz crystal in. Use a 10ppm or better. Cheap crystals = drift = lost packets. | | 22 | CE | Chip Enable. The "wake up" button. | bk2461 datasheet
| You want to... | Do this... | | :--- | :--- | | | Use REG6 = 0x07 (+4 dBm). The PA draws half the current. | | Avoid collisions | Turn on "LBT" (Listen Before Talk) in Register 0x2E. | | Debug why no packets arrive | Read Register 0x0A (Packet loss counter). | | Use a PCB trace antenna | Match to 50 Ohms + add a series 1.5pF cap. | Always refer to the latest official BK2461 datasheet
(compatible with the 8051 instruction set), making it ideal for low-power, cost-sensitive applications like wireless mice, keyboards, and remote controls. Key Technical Features Core Microcontroller : Features a FLIP51 MCU | | 5 | ANT | The output