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Dismantling of famous products 111: Xiaomi AKKU Anku 50-meter laser rangefinder, HK32MCU empowers intelligent distance measurement
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Dismantling of famous products 111: Xiaomi AKKU Anku 50-meter laser rangefinder, HK32MCU empowers intelligent distance measurement

  • Categories:Group news
  • Author:shaodong
  • Origin:Hangshun chip
  • 2022.03.08

(Summary description)Xiaomi AKKU Anku's 50-meter laser rangefinder has the characteristics of data storage, high-definition large-screen display, and multiple measurement modes, making distance measurement in home, industry, and construction scenarios more convenient, fast, safe and reliable.

Dismantling of famous products 111: Xiaomi AKKU Anku 50-meter laser rangefinder, HK32MCU empowers intelligent distance measurement

(Summary description)Xiaomi AKKU Anku's 50-meter laser rangefinder has the characteristics of data storage, high-definition large-screen display, and multiple measurement modes, making distance measurement in home, industry, and construction scenarios more convenient, fast, safe and reliable.

  • 2022-03-08
Information

Xiaomi AKKU Anku's 50-meter laser rangefinder has the characteristics of data storage, high-definition large-screen display, and multiple measurement modes, making distance measurement in home, industry, and construction scenarios more convenient, fast, safe and reliable. The appearance of the product is small and flexible, and the operation is simple. It is an ideal distance measurement tool.

● The actual product picture of Xiaomi AKKU Anku 50m Laser Rangefinder

 

Product main parameters:
Item model number: AK302
Measuring range: 0.2 -- 50m
Measurement accuracy: plus or minus 2 mm
Laser class: Class 2 (620--690nm, <1mW)
Executive standard: GB 7247.1 -- 2012
Function selection: front and rear distance selection, single measurement, continuous measurement, area measurement, volume measurement.

 

● Product functional block diagram

 

● Physical map of product core board

 

Product core board features:

 

This series of products adopts Hangshun HK32F030 series MCU chip, obtains the distance information of the laser sensor module through the high-precision ADC and IIC interface of the chip, and then calculates the precise distance through the excellent CPU performance of the chip; through the chip's external interrupt function to achieve Key control, command input and reading functions; interactive display of information with the display screen through the chip's SPI; and ultra-long standby function through the chip's excellent power management mode.

 

Hangshun chip HK32F030 series MCU features:

➤CPU
◦ ARM Cortex-M0 core
◦ Maximum clock frequency: 72MHz
◦ 24-bit System Tick timer
◦ Support CPU Event signal input to MCU pins to realize linkage with other SOC CPUs on the board
➤Operating voltage range
◦ Single power domain: main power VDD is 2.0 V ~ 5.5V
➤Working temperature range: -40℃ ~ +105℃
➤ VDD typical operating current
◦ Run mode: 13.23 mA/72MHz@3.3V
◦ Sleep mode: 5.44 mA@3.3V
◦ Stop mode:
- LDO low power consumption: 10 μA@3.3V
- LDO working at full speed: 128 μA@3.3V
◦ Standby mode: 1.64 μA@3.3V
➤ Storage
◦ Flash memory up to 64 Kbytes
◦ When the CPU frequency is not higher than 24 MHz, it supports zero wait bus cycle
◦ With code security protection function, read protection and write protection can be set separately
◦ Supports encryption of instructions and data stored in Flash to prevent Flash content from being physically attacked
◦ 10 Kbyte SRAM
➤ Clock
◦ External HSE: 4~16 MHz, typical frequency is 8MHz
◦ External LSE: 32.768 kHz
◦ On-chip HSI: 8 MHz/14 MHz/56 MHz
◦ On-chip LSI: 40 kHz
◦ PLL clock
◦ Chip pin input clock
➤ Reset
◦ External pin reset
◦ Power-on/power-off reset
◦ Software reset
◦ Watchdog timer reset (IWDG and WWDG)
◦ Low power mode reset
➤ Programmable Voltage Monitor (PVD)
◦ 8-level detection voltage threshold adjustable
◦ Configurable rising and falling edge detection
➤GPIO
◦ Up to 55 GPIO pins
◦ Each GPIO pin can be configured as an external interrupt input
◦ Provides up to 20 mA drive current
➤ DMA
◦ 5 channel DMA controller
◦ Support Timer, ADC, SPI, I2C, USART and other peripheral triggers
➤ Secure encryption
◦ CRC calculation unit
➤Data communication interface
◦ 2 USARTs: supports master synchronous SPI and modem control, with ISO7816 interface, LIN, IrDA capability, auto-baud rate detection and wake-up features
◦ 2 high-speed SPIs: I2S interface supporting 4 to 16 programmable bit frames and multiplexing
◦ 2 I2C: Supports Overdrive (1 Mbit/s), SMBus and PMBus, wake-up from shutdown
➤ Timer
◦ 1 Advanced Control Timer (TIM1)
◦ 5 general purpose timers (TIM3/TIM14/TIM15/TIM16/TIM17)
◦ 1 basic timer (TIM6)
➤ Calendar RTC with alarm function to wake up from stop/standby mode cycle
➤ On-chip analog circuit
◦ 1 12-bit ADC: 16 external analog signal input channels, support automatic continuous conversion and scan conversion up to 1 MSPS sampling frequency
◦ 1 temperature sensor: Analog output internally connected to A/D converter independent channel
➤ Fixed-point division/square root operation unit
◦ 32-bit fixed-point division is supported, and the quotient and remainder can be obtained at the same time
◦ Supports high-precision square root of 32-bit fixed-point numbers
➤CPU tracing and debugging
◦ SWD debug port
➤Reliability


◦ Passed HBM2000V/CDM500V/MM200V/LU level test

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