PKE (passive keyless entry) system consists of car key and on-board control unit. When the car key enters the specified range, it receives the induction signal from the vehicle-mounted module and transmits an acknowledge signal. After receiving the point wave signal, the car end judges whether it is legally authorized to automatically unlock. The data stream is usually 64 to 128 bits long, including a preamble bit, a command code and a rolling code, which is often transmitted at a rate of 2 KHz to 20 KHz and in ASK modulation mode, so as to prolong the battery life of the key chain.

Unicmicro provides a complete PKE solution based on the key solution composed of RX SoC UM2082F08 with low power, high performance and low frequency and TX FSK(OOK) UM2001 (or 2.4-G TX chip UM2052), and the TX end of base station composed of low-power 32-bit MCU UM3213A and FSK (OOK) RX chip UM2002 (or 2.4-G RX chip UM2052).

Block Diagram

Effective trigger distance: 4–5 m

Intelligent two-way communication system, no manual intervention required

Key product recommendation

Unicmicro (Guangzhou) Co., Ltd. focuses on the industries such as new energy, inverter motor control, low-power IoT and automobile electronics, providing customers with differentiated microcontroller chips, fast charging and digital power management chips, analog and RF front-end chips, as well as innovative solutions regarding low-power IoT, digital power and motor control.

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