Specifications

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1. Overview of the main chip WT5105
The WT51XX series is a high-performance Bluetooth system-on-chip (SoC) launched by
The wireless-tag company. It supports Bluetooth 5.0 and can be widely used in mobile
devices, wearable products, and Internet of Things (IoT) products. This series of chips can
help users develop Bluetooth low energy application products with central and/or
peripheral roles.
• ARM® Cortex®-M0 32-bit microprocessor
• Storage
• 512KB/2MB system flash memory, 128KB ROM, 138KB SRAM, all data is kept constant
in sleep mode, 8-channel DMA
• 33/19 general purpose I/O pins
3 QDEC decoders, 6 channel PWM, 4 channel I2S, 2 channel PDM, 2 channel I2C, 2
channel SPI, 1 channel UART
JTAG
• Support DMIC/AMIC microphone function
• 8-channel 12-bit ADC supporting low-noise PGA
• 4-channel 24-bit clock, 1 monitoring clock, real-time counter (RTC)
• Power management
（1.8-3.6V）Embedded LDOs, embedded step-down DC-DC, supply voltage range (1.8-
3.6V)
Power monitor: support low battery detection
• Power consumption
Sleep mode, only wake up through IO, current amount is 0.8uA
Sleep mode, wake up by RTC, current amount 7uA
Peak system current in RX mode 6.7mA
Peak system current 6.7mA at TX 0dBm transmit power
• RC oscillator hardware calibration
32KHz RC RTC oscillator automatic calibration, accuracy is +/-500ppm
32MHz RC HCLK oscillator automatic calibration, accuracy is 3%
• High rate throughput
• Support BLE 2Mbps protocol
• Support data length extension (DLE) function
• Support SIG-Mesh
• 2.4G transceiver
• Support BLE5.0
• RFPHY1Mbps/2Mbps/500Kbps/125Kbps
• Receive sensitivity:
• BLE1Mbps data rate: -97dBm
• BLE125Kbps data rate: -103dBm
• Transmit power: -20dBm to 10dBm, 3dBm step
• Single-pin antenna: no RF matching or RX/TX switching