一、Function Description

（一）、Briefly describe

WK25T00-5NR32 is a high-performance and low-power BDS/GNSS navigation and positioning module, which is equipped with Zhongke Microelectronics' fifth generation low-power AT6558R SOC chip. The chip integrates RF front-end, digital baseband processor, 32-bit RISC CPU, and power management function.

WK25T00-5NR32 supports multiple satellite navigation systems, including China's BDS (Beidou Navigation Satellite System), the United States' GPS, Russia's GLONASS, Japan's QZSS, and satellite augmentation systems SBAS (WAAS, EGNOS, GAGAN, MSAS), with 32 tracking channels that can simultaneously receive GNSS signals from six satellite navigation systems and achieve joint positioning and navigation.

WK25T00-5NR32 has advantages such as high sensitivity, low power consumption, and low cost, and is suitable for in car navigation, handheld intelligent terminals, car rearview mirrors, shared bicycles, drones, and more.

（二）、Main features

<!--[if !supportLists]-->l <! --[endif] ->WK25T00-5NR32 supports BDS/GPS satellite navigation system single system positioning or multi system joint positioning (can locate any single system version or multi system combination version of BDS/GPS/GLONASS);

<!--[if !supportLists]-->l <! --[endif] ->Supports A-GNSS for fast cold start and weak signal fast positioning;

<!--[if !supportLists]-->l <! --[endif] ->Cold start capture sensitivity: -148dBm;

<!--[if !supportLists]-->l <! --[endif] ->Hot start capture sensitivity: -156dBm;

<!--[if !supportLists]-->l <! --[endif] ->Re capture sensitivity: -160dBm;

<!--[if !supportLists]-->l <! --[endif] ->Tracking sensitivity: -162dBm;

<!--[if !supportLists]-->l <! --[endif] ->Positioning accuracy: 2.5 meters (CEP50);

<!--[if !supportLists]-->l <! --[endif] ->First positioning time: ≤ 32 seconds;

<!--[if !supportLists]-->l <! --[endif] ->Low power consumption: continuous operation ≤ 25mA;

<!--[if !supportLists]-->l <! --[endif] ->Built in antenna detection and antenna short circuit protection function;

<!--[if !supportLists]-->l <! --[endif] ->Onboard high-performance 25x25x4mm high-performance ceramics;

<!--[if !supportLists]-->l <! --[endif] ->Built in LNA;

<!--[if !supportLists]-->l <! --[endif] ->The onboard button battery can achieve rapid hot start (<1s hot start);

<!--[if !supportLists]-->l <! --[endif] ->Standard NMEA-0183 protocol output.

（三）、application

<!--[if !supportLists]-->l <! --[endif] ->Car rearview mirror;

<!--[if !supportLists]-->l <! --[endif] ->Handheld devices;

<!--[if !supportLists]-->l <! --[endif] ->Ship/car navigation;

<!--[if !supportLists]-->l <! --[endif] ->location tracking service;

<!--[if !supportLists]-->l <! --[endif] ->Portable device.

（四）、Assisted GNSS

The WK25T00-5NR32 module supports Assisted GNSS (AGNSS) functionality, which can provide the necessary auxiliary information for the receiver to locate, such as telegrams, rough location, and time. Whether in strong or weak signal environments, this information can significantly shorten the first localization time.

（五）、Output Protocol

The WK25T00-5NR32 module uses UART as the main output channel and follows the protocol format of the universal protocol NMEA0183 for output.

（六）、performance metrics

二、Product description

（一）、Module appearance

             positive                                               back side

<!--[if !supportLists]-->l <! --[endif] ->The front of the module is a 25x25x4mm ceramic antenna;

<!--[if !supportLists]-->l <! --There is a 21.3x13.5x2mm shielding cover on the back of the module;

<!--[if !supportLists]-->l <! --[endif] ->There is a button battery on the back that provides backup current for the internal chips of the module, ensuring fast positioning of the chip during hot start;

<!--[if !supportLists]-->l <! --[endif] ->There is a PPS indicator light on the back, which flashes after successful positioning;

<!--[if !supportLists]-->l <! --[endif] ->The back has 5PIN 1.25mm terminals (pins arranged in order: GND, RX, TX, 5V, PPS), and is compatible with 4PIN 1.25mm terminals (without PPS), as well as 5PIN wire pads (pins arranged in order: GND, RX, TX, 5V, GND).

（二）、Dimensional drawing (mm)

             Top View                   Side View                 Bottom View

<!--[if !supportLists]-->l <! --[endif] ->The module size is 25x26x7mm;

<!--[if !supportLists]-->l <! --[endif] ->The spacing between terminal pads is 1.25mm;

<!--[if !supportLists]-->l <! --[endif] ->The spacing between wire and pad is 2.0mm;

<!--[if !supportLists]-->l <! --[endif] ->Ceramic antenna size is 25x25x4mm;

<!--[if !supportLists]-->l <! --[endif] ->The size of the shielding cover is 21.3x13.5x2mm;

<!--[if !supportLists]-->l <! --[endif] ->The opening size of the shielding cover is a radius of 2.2mm.

<!--[if !supportLists]-->（三）<!--[endif]-->、Pin description

三、electrical performance

（一）、Limit parameter

（二）、operating parameters