CN205809631U - A kind of 16 passage high accuracy data synchronous acquisition devices - Google Patents

Abstract

A kind of 16 passage high accuracy data synchronous acquisition devices, including shell and interior arrangement, described shell is box-type shell, the side at the top of shell is provided with a removable cover, opposite side in cover top portion is provided with touch screen, system indicator and button, is provided with SD draw-in groove in the front of described shell, jtag interface, 485 communication interfaces, MicroUSB interface turn USART interface and buzzer；Right flank at shell is provided with analog input end；Described interior arrangement includes middle control module, power module, GPS module, AD sampling plate, zigbee module, communication module and memorizer.This utility model controls data acquisition, volume networking little, cheap, easy, man-machine interaction convenience, easy care by touch screen, can be flexibly applied to power distribution network, power distribution station.

Description

A kind of 16 passage high accuracy data synchronous acquisition devices

Technical field

This utility model relates to data acquisition technology field, a kind of 16 passage high accuracy data synchronous acquisition Device.

Background technology

In power system industry, one of synchronized phasor measurement technology research advanced subject having become as hot topic.Along with The development of regional power system interconnection, the scale of power system is the hugest, and whole electrical network is done by the unknown event in electrical network Disturb impact the biggest, and be more difficult to detect and keep in repair.Synchronous phasor measuring device (PMU) provides understanding for analyzing operation of power networks state Certainly incidence of criminal offenses.The documents and materials consulted at present and the main selecting type scheme of the PMU equipment of domestic and international manufacturer production have DSP+FPGA, DSP+CPLD, ARM+FPGA, DSP+ industrial computer, DSP+ARM etc..The popular feature that these phasor measuring sets (PMU) have Being bulky, internal complicated, maintenance difficulties is big, expensive, installs complexity, and clock synchronization accuracy is poor, is not suitable for large area Configuration, it is impossible to meet the requirement being flexibly applied to micro-capacitance sensor, power distribution network.

Utility model content

The purpose of this utility model is to provide a kind of mini PMU, a kind of 16 passage high accuracy data synchronous acquisition dresses Put, the confinement problems that the existing PMU for solving applies at micro-capacitance sensor, power distribution network.

The technical scheme in the invention for solving the technical problem is: a kind of 16 passage high accuracy datas synchronize to adopt Acquisition means, including shell and interior arrangement, is characterized in that, described shell is box-type shell, in the side at the top of shell Being provided with a removable cover, the opposite side in cover top portion is provided with touch screen, system indicator and button, described touch screen Being arranged on the top of cover top portion opposite side, system indicator is arranged on the lower section of touch screen, and button is arranged on system indicator Lower section；Be provided with SD draw-in groove in the front of described shell, jtag interface, 485 communication interfaces, MicroUSB interface turn USART Interface and buzzer；Right flank at shell is provided with analog input end；

Described interior arrangement includes middle control module, power module, GPS module, AD sampling plate, zigbee module, communication Module and memorizer, described middle control module is respectively with power module, GPS module, AD sampling plate, zigbee module, communicate mould Block, memorizer, touch screen, system indicator, button are connected with buzzer；Described communication module is connected with 485 communication interfaces, Memorizer is connected with SD draw-in groove, and middle control module turns USART interface, jtag interface and buzzer with MicroUSB interface and is connected, institute The MicroUSB interface stated turns USART interface also for power supply interface；Described AD sampling plate is connected with analog input end.

Further, described middle control module includes single chip circuit；Single chip circuit includes STM32F103ZET6 chip Circuit, single-chip microcomputer extend out SRAM circuit and USART turns USB circuit；Single-chip microcomputer extends out SRAM circuit and USART turn USB circuit with STM32F103ZET6 chip circuit is connected；

AD sampling plate includes AD7606 chip and peripheral circuit, outside reference source circuit, the simulation input electricity of AD7606 The interface circuit of road and AD7606 and single-chip microcomputer；The analog input circuit of outside reference source circuit and AD7606 respectively with AD7606 The input of chip and peripheral circuit thereof is connected, the outfan of AD7606 chip and peripheral circuit thereof and STM32F103ZET6 core Sheet circuit is connected；

Described power module includes power circuit；Described memorizer includes SPI FLASH memory circuit；Described Communication module includes 485 telecommunication circuits；

Described touch screen is connected with single-chip microcomputer by touch screen interface circuit；Described SD draw-in groove passes through SD draw-in groove wiring Circuit is connected with single-chip microcomputer；Described system indicator is connected with single-chip microcomputer by LED lamp circuit；Described button passes through button Circuit is connected with single-chip microcomputer；Described buzzer is connected with single-chip microcomputer by buzzer circuit.

Further, described system indicator includes power supply indicator, program run indicator and the read-write instruction of SD card Lamp；Described button includes key, reset key and time synchronized key；Described AD sampling plate includes the first sampling plate and second Sampling plate, the triggering sampling pin of the first sampling plate and the second sampling plate is connected.

Further, described single-chip microcomputer extends out SRAM circuit and uses IS62WV51216BLL chip, and USART turns USB electricity Road uses CH34OG chip；

The outside reference source circuit of described AD sampling plate uses REF5025 chip, and the analog input circuit of AD sampling plate is adopted With ANALOG INPUT chip and exclusion；

Described power circuit uses AMS117-3.3 chip and unidirectional transient voltage suppressor；

Described SPI FLASH memory circuit uses FLASH_W25Q128 chip, with the PB12 pin of single-chip microcomputer and PB14 pin is connected；

485 described telecommunication circuits use SP3485 chip, are connected with the PA2 pin of single-chip microcomputer；

Described touch screen interface circuit uses TOUCH_LCD chip, and TOUCH_LCD chip is with single-chip microcomputer by FSMC even Connect；

Described SD draw-in groove connection circuit uses SD CARD chip, is connected with the SDIO pin of single-chip microcomputer.

The beneficial effects of the utility model are: the one 16 passage high accuracy data synchronous acquisition dress that this utility model provides Put and both gather the electric parameter of band time tag, acquisition precision is high, synchronicity is high function, this utility model has again existing simultaneously PMU does not has the special feature that, such as, controls data acquisition, volume networking little, cheap, easy, man-machine interaction side by touch screen Just touch screen, easy care.This device can be flexibly applied to power distribution network, power distribution station, by later stage or on-line analysis (ZigBee group Net, each node uploads collection data to host computer, by upper computer software analytical data) each branch road electricity of collecting of this device joins Amount data, according to the relevant knowledge of power system, accurate and effective can find electric network fault.

When touch screen display GPS location information, RTC time and the program that this utility model uses goes to Key Functions Flag information, and by touch screen selecting data drainage pattern, be divided into gps data synchronous mode and general data to gather mould Formula two kinds.

GPS module of the present utility model by receive satellite-signal, for this device provide synchronous acquisition reference signal and During the school of single-chip microcomputer RTC clock.

This device has synchronous acquisition function: this utility model can be accessed by two AD7606 boards, due to the two of this device The triggering sampling pin of individual AD7606 version links together, so access is same PWM ripple, is achieved in this device hard Part Shang 16 tunnel synchronous data collection；This utility model introduces GPS so that between multiple devices, data acquisition is to start simultaneously at , i.e. synchronization on time shaft.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is structured flowchart of the present utility model；

Fig. 3 is single chip circuit figure of the present utility model；

Fig. 4 is that this utility model single-chip microcomputer extends out SRAM circuit figure；

Fig. 5 is that this utility model USART1 turns USB circuit figure；

Fig. 6 is AD7606 chip of the present utility model and peripheral circuit diagram thereof；

Fig. 7 is outside reference source circuit figure of the present utility model；

Fig. 8 is the analog input circuit figure of AD7606 of the present utility model；

Fig. 9 is the part one of AD7606 of the present utility model and the interface circuit figure of single-chip microcomputer；

Figure 10 is the part two of AD7606 of the present utility model and the interface circuit figure of single-chip microcomputer；

Figure 11 is the part three of AD7606 of the present utility model and the interface circuit figure of single-chip microcomputer；

Figure 12 is power circuit diagram of the present utility model；

Figure 13 is SPI FLASH memory circuit diagram of the present utility model；

Figure 14 is 485 telecommunication circuit figures of the present utility model；

Figure 15 is touch screen interface circuit diagram of the present utility model；

Figure 16 is SD draw-in groove connection circuit figure of the present utility model；

Figure 17 is program run indicator circuit diagram of the present utility model；

Figure 18 is key circuit figure of the present utility model；

Figure 19 is buzzer circuit figure of the present utility model；

In figure: 1, touch screen, 2, system indicator, 3, button, 4, SD draw-in groove, 5, jtag interface, 6,485 communication interfaces. 7, MicroUSB interface turns USART interface, 8, cover plate, 9, GPS module, 10, AD sampling plate, 11, analog input end, 12, Zigbee module.

Detailed description of the invention

This utility model includes shell and interior arrangement.

As it is shown in figure 1, shell is box-type shell, it is provided with a removable cover 8 in the side at the top of shell, at shell The opposite side at top is provided with touch screen 1, system indicator 2 and button 3, and touch screen is arranged on the upper of cover top portion opposite side Portion, system indicator is arranged on the lower section of touch screen, and button is arranged on the lower section of system indicator；It is provided with in the front of shell SD draw-in groove 4, jtag interface 5,485 communication interface 6, MicroUSB interface turn USART interface 7 and buzzer；Right side at shell Face is provided with analog input end 11；

Interior arrangement includes middle control module, power module, GPS module, AD sampling plate, zigbee module 12, communication module And memorizer, as in figure 2 it is shown, middle control module is respectively with power module, GPS module, AD sampling plate, zigbee module, communicate mould Block, memorizer, touch screen, system indicator, button are connected with buzzer；Communication module is connected with 485 communication interfaces, memorizer Being connected with SD draw-in groove, middle control module turns USART interface, jtag interface and buzzer with MicroUSB interface and is connected, MicroUSB Interface turns USART interface also for power supply interface；AD sampling plate is connected with analog input end.

Middle control module includes that single chip circuit, single chip circuit include that STM32F103ZET6 chip circuit, single-chip microcomputer extend out SRAM circuit and USART turn USB circuit；Single-chip microcomputer extends out SRAM circuit and USART turns USB circuit and STM32F103ZET6 core Sheet circuit is connected；AD sampling plate includes AD7606 chip and peripheral circuit, outside reference source circuit, the simulation input of AD7606 The interface circuit of circuit and AD7606 and single-chip microcomputer；The analog input circuit of outside reference source circuit and AD7606 respectively with The input of AD7606 chip and peripheral circuit thereof be connected, the outfan of AD7606 chip and peripheral circuit thereof with STM32F103ZET6 chip circuit is connected；

Power module includes power circuit；Memorizer includes SPI FLASH memory circuit；Communication module includes that 485 lead to Letter circuit；Touch screen is connected with single-chip microcomputer by touch screen interface circuit；SD draw-in groove passes through SD draw-in groove connection circuit and single-chip microcomputer It is connected；System indicator is connected with single-chip microcomputer by LED lamp circuit；Button is connected with single-chip microcomputer by key circuit；Buzzer It is connected with single-chip microcomputer by buzzer circuit.

As it is shown on figure 3, single-chip microcomputer uses STM32F103ZET6 chip.

Fig. 4 is that STM32F103ZET6 extends out SRAM circuit, uses chip I S62WV51216BLL.A0-A18 pin is respectively Meet the FMSC_A0-FMSC_A18 of single-chip microcomputer；D0-D15 pin meets the FSMC_D0-FSMC_D15 of single-chip microcomputer；Read pin OE order The FSMC_NOE pin of sheet machine；Write pin WE and connect the FSMC_NWE pin of single-chip microcomputer；Sheet selects CS pin to meet the FSMC_ of single-chip microcomputer NE3 pin, chip select pin is pulled to numeral 3.3V voltage by 10K resistance R24 simultaneously.High byte position UB connects single-chip microcomputer FSMC_NBL1 pin, low byte position LB connects the FSMC_NBL0 pin of single-chip microcomputer.

Fig. 5 is that USART1 turns USB circuit, uses CH340G chip, and VCC pin connects numeral 5V voltage, and external 0.1uF Decoupling capacitor C31.V3 pin is external 0.01uF decoupling capacitor C30 when 5V supply voltage, and GND pin is received Micro USB and connect The ground wire of mouth.USART turns USB circuit and turns USART interface with the MicroUSB interface on shell and be connected.

As shown in Figure 6, the 44 pin REFCAPA and 45 pin REFCAPB of AD7606 chip and peripheral circuit thereof must be short It is connected together, and by low ESR 10uF ceramic condenser C38 decoupling to AGND.42 pin REFIN/REFOUT connect a 10uF Pottery decoupling capacitor C41.Owing to this device uses outside reference source, 42 pin REFIN/REFOUT to use a 100nF electric capacity C46 and a 10nF electric capacity C47 parallel connection decoupling.36 pins and 39 pin REGCAP respectively by 1uF ceramic condenser C39, C40 decouples to AGND.34 pin REF SEL are pulled down to numeral GND by 10K resistance R19, use outside reference source Working mould Formula.6 pin PAR are pulled down to numeral GND by 10K resistance R20, select the sampling of 16bit parallel interface pattern.23 pin VDRIVE It is digital power input, meets digital power voltage 3.3V.1 pin and 48 pin AVCC are respectively by the electric capacity C50 of 100nF, electricity Hold the electric capacity C51 of C52 and 10nF, electric capacity C53 parallel connection decouples to AGND, and 37,38 pins are then connected together by 100nF electric capacity (C54) decoupling in parallel with 10nF electric capacity (C55) is to AGND, it is ensured that pure to AD7606 power supply.

As it is shown in fig. 7, the outside reference source circuit of AD7606 uses 2.5V reference voltage chip REF5025, the VIN of chip Pin and VOUT pin are all connected in parallel to AGND by a 10uF electric capacity and a 100nF electric capacity.

As shown in Figure 8, the totally 8 tunnel input of the analog input circuit of AD7606, including IN1 pin～IN8 pin, accesses and hands over directly Stream voltage signal, input voltage range is+10V～-10V or+5V～-5V, can set the input range of AD7606.Simulation A series resistance should be placed in input channel, input voltage is exceeded ± 16.5V time electric current be limited in ± below 10mA. This utility model is connected 51 Ω resistance R22 on analog input channel V1～V8, accordingly at analog input channel V1GND ～the 51 Ω resistance R21 that also connect on V8GND.Series resistance value on Vx and VxGND passage is equal, in case stop-pass road Detuning phenomena occurs.Meanwhile, between V1～V8 and V1GND～the V8GND passage of AD7606 100pF electric capacity C57 in parallel～ Electric capacity C64.

As shown in Figures 9 to 11, AD7606 and the interface circuit of single-chip microcomputer, P13 is the winding displacement interface of AD7606 plate, VDRIVE meets digital power 3.3V, to the 23 pin supply numeral 3.3V voltages of AD7606.The CS pin of AD7606 is by 10K electricity Resistance R23 is pulled to digital power 3.3V.The BUSY pin of AD7606 passes through 100pF electric capacity C65 and is digitally connected, corresponding list The BUSY pin of sheet machine is then configured to pull-up resistor input, and trailing edge triggers interrupt mode.This utility model can connect two AD7606 sampling plate, the first sampling plate and the second sampling plate, the triggering sampling pin of two pieces of sampling plates is connected.P10 connects first and adopts Collection plate, P11 connects the second collection plate.It is different that P10 with P11 only has two wiring, be respectively the sheet of AD7606 select CS pin and The BUSY pin of AD7606.P10 receives the FSMC_NE1 pin of single-chip microcomputer the chip select pin of the first collection plate, No. 1 The BUSY pin of AD7606 plate connects the PC1 of single-chip microcomputer, corresponding No. 1 interruption.P11 receives list the chip select pin of No. 2 AD7606 plates The FSMC_NE2 pin of sheet machine, connects the BUSY pin of No. 2 AD7606 plates the PC2 of single-chip microcomputer, corresponding No. 2 interruptions.And first adopts The triggering pin CONVST of collection plate and the second collection plate receives PB1 (TIME3CH4) pin of single-chip microcomputer, the passage of intervalometer 3 4 produce PWM ripple triggers 2 pieces of AD7606 synchronized samplings, reaches the purpose of 16 road synchronized samplings.

As shown in figure 12, this utility model power supply interface uses Micro USB interface, D3 and D4 is that unidirectional transient electrical is constrained Diode processed, plays power conditioner effect, can more effectively suppress interference, prevents interference from entering single-chip microcomputer and other chips, from And improve the reliability of system.LED POWER is the power supply indicator of device.Device reserve 3.3V and 5V power interface P8, P9, facilitates extension and the debugging of device.

As shown in figure 13, SPI FLASH memory can use W25Q128 chip, W25Q64 chip, W25Q3 2 chip, this Utility model uses W25Q128 chip, and the SPI2 pin connection of single-chip microcomputer STM32 communicates.Owing to this utility model has Touch screen, needs Display of Chinese characters, and Hanzi font library Documents Comparison is big, and the storage inside of STM32 single-chip microcomputer is limited, this FLASH Chip is used for storing character library and other data of system.

As shown in figure 14,485 telecommunication circuits use SP3485 chip；It is connected to the pull-up resistor R11 of A pin and is connected to The pull down resistor R12 of B pin is used for ensureing that connectionless SP485R chip is in idle condition, it is provided that network failure is protected, with The reliability resistance R11, resistance R12 and the resistance R13 that improve RS-485 node and network are variable resistance, and needing should according to reality With changing its size of size.Clamper is used for protecting RS-485 bus in TVS pipe D5, TVS pipe D6 and TVS pipe D7 of 6.8V, it is to avoid The high pressure that RS-485 bus produces (such as thunderbolt, surge) when by external interference damages RS-485 transceiver.Audion Q1 is used for Automatically conversion 485 reiving/transmitting states.

As shown in figure 15, touch screen interface circuit, use the FSMC bus of STM single-chip microcomputer and the liquid-crystal controller of touch screen Chip communication, it may be assumed that using the NOR PSRAM Schema control LCD of FSMC, chip select pin CS of touch screen meets the FSMC_ of single-chip microcomputer NE4 pin, address is at BANK4.The reading pin LCD_RD of touch screen connects the FSMC_NOE pin of single-chip microcomputer；Touch screen write pin LCD_WR connects the FSMC_NEW pin of single-chip microcomputer, and the reset pin of touch screen and monolithic processor resetting pin share.The number of touch screen The FSMC_A8 pin of single-chip microcomputer is connect according to/command selection pin LCD_DC pin, by arranging the height of the A8 position of FSMC address, Realize controlling screen and be carried out data manipulation or command operating.Use the touch screen controller chip of SPI1 interface and touch screen Communication.The i.e. SCK pin of touch screen controller chip connects the SPI1_SCK pin of single-chip microcomputer, and MOSI pin connects single-chip microcomputer SPI1_MOSI pin, MISO pin connects the SPI1_MISO pin of single-chip microcomputer, and CS pin connects the SPI1_CS pin of single-chip microcomputer, in Disconnected pin INT connects the PB9 pin of single-chip microcomputer, and corresponding No. 9 pins interrupt.

As shown in figure 16, SD draw-in groove connection circuit connects the SDIO pin of stm32, and SD card is for storing the 8 of AD7606 collection Channel data.

Concrete storage mode is: first at the newly-built file named with the date on the same day of SD card root, such as: " 2016.6.10 ", represents on June 10th, 2016, as long as the data that on June 10th, 2016 gathers all are stored in " 2016.6.10 " Under file.For another example, if this utility model is also required to gather data on June 11st, 2016, then can be at SD card root A newly-built file named with " 2016.6.11 ", the original file of SD card is unaffected；

Then single-chip microcomputer is newly-built to gather the HEX file of moment name, such as under current date file root: " 18.20.30 ", represents 6: 20: 30 afternoon, and the 8 passage hexadecimal datas that AD7606 gathers are stored in this HEX literary composition In part.

System indicator includes power supply indicator, program run indicator and SD card read-write display lamp.

As shown in figure 17, for the circuit of this utility model program run indicator, the Circuits and Systems of remaining display lamp Indicator light circuit is identical.

LED1 is used as program execution state display lamp, if LED1 flicker, in representing that Single Chip Microcomputer (SCM) program is carrying out, work Normally；If LED1 does not flashes, then it represents that Single Chip Microcomputer (SCM) program performs to be occurred extremely.Equally, when reading and writing SD card Time, data storage display lamp can flash.

Button includes key, reset key and time synchronized key.

As shown in figure 18, for key circuit, remaining key circuit is identical with key circuit.

As shown in figure 19, owing to single-chip microcomputer pin drives electric current less, audion is therefore used to drive buzzer, high level Triggering buzzer rings.Buzzer is used as various promptings: after gathering data and being saved in SD card the most completely, buzzer can send The sound at certain frequency interval；Occur abnormal in system program performs, or GPS module detection is abnormal, or at the beginning of other modules Beginningization can send another frequency sound time abnormal.

Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines, but not to this practicality The restriction of novel protected scope, on the basis of the technical solution of the utility model, those skilled in the art need not pay wound The property the made various amendments that can make of work or deformation are still within protection domain of the present utility model.

Claims (4)

1. a 16 passage high accuracy data synchronous acquisition device, including shell and interior arrangement, is characterized in that, described shell For box-type shell, the side at the top of shell being provided with a removable cover, the opposite side in cover top portion is provided with touch Screen, system indicator and button, described touch screen is arranged on the top of cover top portion opposite side, and system indicator is arranged on tactile Touching the lower section of screen, button is arranged on the lower section of system indicator；Be provided with in the front of described shell SD draw-in groove, jtag interface, 485 communication interfaces, MicroUSB interface turn USART interface and buzzer；Right flank at shell is provided with analog input end；

Described interior arrangement includes middle control module, power module, GPS module, AD sampling plate, zigbee module, communication module And memorizer, described middle control module respectively with power module, GPS module, AD sampling plate, zigbee module, communication module, deposit Reservoir, touch screen, system indicator, button are connected with buzzer；Described communication module is connected with 485 communication interfaces, storage Device is connected with SD draw-in groove, and middle control module turns USART interface, jtag interface and buzzer with MicroUSB interface and is connected, described MicroUSB interface turns USART interface also for power supply interface；Described AD sampling plate is connected with analog input end.

A kind of 16 passage high accuracy data synchronous acquisition devices the most according to claim 1, is characterized in that, described middle control Module includes single chip circuit；Single chip circuit include STM32F103ZET6 chip circuit, single-chip microcomputer extend out SRAM circuit and USART turns USB circuit；Single-chip microcomputer extends out SRAM circuit and turns USB circuit with USART and be connected with STM32F103ZET6 chip circuit；

AD sampling plate include AD7606 chip and peripheral circuit thereof, outside reference source circuit, the analog input circuit of AD7606 and AD7606 and the interface circuit of single-chip microcomputer；The analog input circuit of outside reference source circuit and AD7606 respectively with AD7606 chip And the input of peripheral circuit is connected, the outfan of AD7606 chip and peripheral circuit thereof and STM32F103ZET6 chip electricity Road is connected；

Described power module includes power circuit；Described memorizer includes SPI FLASH memory circuit；Described communication Module includes 485 telecommunication circuits；

Described touch screen is connected with single-chip microcomputer by touch screen interface circuit；Described SD draw-in groove passes through SD draw-in groove connection circuit It is connected with single-chip microcomputer；Described system indicator is connected with single-chip microcomputer by LED lamp circuit；Described button passes through key circuit It is connected with single-chip microcomputer；Described buzzer is connected with single-chip microcomputer by buzzer circuit.

A kind of 16 passage high accuracy data synchronous acquisition devices the most according to claim 2, is characterized in that, described system Display lamp includes power supply indicator, program run indicator and SD card read-write display lamp；Described button includes key, reset Key and time synchronized key；Described AD sampling plate includes the first sampling plate and the second sampling plate, the first sampling plate and the second sampling The triggering sampling pin of plate is connected.

A kind of 16 passage high accuracy data synchronous acquisition devices the most according to claim 3, is characterized in that, described monolithic Machine extends out SRAM circuit and uses IS62WV51216BLL chip, and USART turns USB circuit and uses CH34OG chip；

The outside reference source circuit of described AD sampling plate uses REF5025 chip, and the analog input circuit of AD sampling plate uses ANALOG INPUT chip and exclusion；

Described power circuit uses AMS117-3.3 chip and unidirectional transient voltage suppressor；

Described SPI FLASH memory circuit uses FLASH_W25Q128 chip, draws with PB12 pin and the PB14 of single-chip microcomputer Foot is connected；

485 described telecommunication circuits use SP3485 chip, are connected with the PA2 pin of single-chip microcomputer；

Described touch screen interface circuit uses TOUCH_LCD chip, and TOUCH_LCD chip is connected by FSMC with single-chip microcomputer；

Described SD draw-in groove connection circuit uses SD CARD chip, is connected with the SDIO pin of single-chip microcomputer.