CN213302800U

CN213302800U - Low-power consumption singlechip development board

Info

Publication number: CN213302800U
Application number: CN202021217008.0U
Authority: CN
Inventors: 王凡
Original assignee: University of Electronic Science and Technology of China Zhongshan Institute
Current assignee: University of Electronic Science and Technology of China Zhongshan Institute
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-05-28
Anticipated expiration: 2030-06-28

Abstract

The utility model relates to a low-power consumption singlechip development board at first adopts a low-power consumption MCU, and wherein the kernel adopts Harvard structure and tertiary pipeline structure, can operate in 5 kinds of low-power consumption modes: a waiting mode; a low power consumption mode of operation; a low power consumption standby mode; full clock wake-sleep mode; a sleep mode. The problem of when using battery power supply, traditional singlechip standby time is short is solved, and secondly power module can both be for nuclear core plate and expansion board power supply, can stand by for a long time, makes host system and expansion interface electricity be connected through the interconnection of first connector and second connector at last for the development board has more interfaces to connect peripheral equipment.

Description

Low-power consumption singlechip development board

Technical Field

The utility model relates to a singlechip development board technical field especially relates to a low-power consumption singlechip development board.

Background

The singlechip is a device widely applied to industrial control places, a single control device is required to have longer working time along with the development of the Internet of things, and the existing singlechip development board does not consider the requirement of low power, so a large number of peripheral devices are integrated, therefore, a core controller of the singlechip is not a low-power-consumption processor, the development board is also integrated with too many peripheral devices, the total energy consumption is too large, the standby time is very short, and too many peripheral devices occupy too many expansion interfaces, so the interfaces are not enough.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the technical scheme provides a low-power-consumption singlechip development board.

The technical scheme is as follows:

a low-power-consumption singlechip development board comprises a core board, an expansion board and a power supply circuit for supplying power to the core board and the expansion board, wherein the core board comprises a main control module, a first peripheral circuit and a first connector, and the expansion board comprises a second peripheral circuit and a second connector;

the main control module is an STM8L152R8T 6-based single chip microcomputer;

the main control module is electrically connected with the first peripheral circuit and the first connector;

the second peripheral circuit is interconnected with the first connector through the second connector;

the second connector is also provided with a function expansion interface.

In some embodiments, the power supply circuit includes a first power supply module, the first power supply module is provided with a TTL to USB circuit connected to a USB port to supply power to the main control module, the first power supply module further includes a first power switching circuit connected to the USB port, and the first power switching circuit is further provided with a power circuit capable of supplying power to the main control module.

In some embodiments, the power supply circuit further comprises a second power supply module, the second power supply module is provided with a second power supply switching circuit connected with the USB port and the power supply circuit connected with the second power supply switching circuit and supplying power to a second peripheral circuit, and the first power supply switching circuit is complementary with the second power supply switching circuit through a first connector and a second connector.

In some embodiments, the first peripheral circuit includes a download emulation circuit, an external clock circuit, a reset circuit, an EPROM memory, and an indicator light.

In some embodiments, the second peripheral circuit includes a bluetooth module, a WIFI module, a SPI/I2C expansion interface, and a fingerprint module.

In some embodiments, the first connector and the second connector are at a 1.27MM pitch and are located on the board edge of the main control module.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a first schematic structural diagram of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the utility model provides a low-power consumption singlechip development board, which includes a core board, an expansion board and a power supply circuit 1 for supplying power to the core board and the expansion board, wherein the core board includes a main control module 2, a first peripheral circuit 3 and a first connector 4, and the expansion board includes a second peripheral circuit 5 and a second connector 6; the main control module 2 is an STM8L152R8T 6-based single chip microcomputer; the main control module 2 is electrically connected with the first peripheral circuit 3, and the main control module 2 is also electrically connected with the first connector 4; the second peripheral circuit 5 is interconnected with the first connector 4 through the second connector 6; the second connector 6 is also provided with a function expansion interface.

In this embodiment, the power supply circuit includes a first power supply module 101, the first power supply module 101 is provided with a TTL to USB circuit connected to the USB port to supply power to the main control module 2, the first power supply module 101 further includes a first power switching circuit connected to the USB port, the first power switching circuit is further provided with a power circuit capable of supplying power to the main control module, the TTL to USB circuit is a virtual serial port, the UART1 of the single chip microcomputer is converted into a USB interface through the CH340 to be connected to a PC, and is responsible for communication with the PC, and the USB interface of the core board provides a virtual serial port communication interface, which is specially used for human-computer interaction with the PC. The power supply circuit can provide working power supply for the core board and the expansion board and comprises the LDO and the filter circuit. The input of the connector is 5V power supply for a USB interface of a core board, the output of the connector is 3.3V power supply for a main control module, pins of the core board extending function of a first connector are led out to an extending board, and related signals of power supply switching between the core board and the extending board are obtained.

In this embodiment, the power supply circuit further includes a second power supply module 102, the second power supply module 102 is provided with a second power supply switching circuit connected to the USB port and a power supply circuit connected to the second power supply switching circuit and supplying power to a second peripheral circuit, the first power supply switching circuit is complementary to the second power supply switching circuit through a first connector 4 and a second connector 6, and the core board and the expansion board can both supply power to the core board, except that the core board cannot supply power more than 500mA when the core board is used as a virtual serial port for communication, and the expansion board can be supplied with power by a USB charger, and the current may exceed 500 mA. Of course the core board may also be powered by a USB charger. The core board and the expansion board need a power supply switching circuit, i.e. an alternative circuit, and when the expansion board supplies power, the power supply circuit of the core board is in an off state even if the USB interface is inserted into the core board. And vice versa. The power supply is flexible and convenient to select.

In this embodiment, the first peripheral circuit 3 includes a download simulation circuit, an external clock circuit, a reset circuit, an E2PROM memory, and an indicator light, the download simulation circuit is responsible for simulating and downloading STM8 in the circuit, the external clock circuit provides an external high-speed clock circuit for a 16M crystal oscillator or an external low-speed clock circuit for a 32K crystal oscillator, the state indicator light indicates the operating state of STM8, the reset circuit includes a key reset switch and a power-on reset circuit, and the I2C is connected to the E2PROM memory, so that a small amount of important data can be stored.

In this embodiment, second peripheral circuit 5 includes bluetooth module, the WIFI module, SPI/I2C expansion interface and fingerprint module, link to each other with the first connector of nuclear core plate through the second connector, wherein use UART2 to link to each other with bluetooth module, leave row female interface on the board, state pin and EN pin link to each other with the GPIO, control whether power supply is supplied to bluetooth module through GPIO control MOS, and fingerprint module links to each other with UART3, touch IC supplies power always, and touch IC output signal line receives the interrupt pin of singlechip. Once a fingerprint is pressed, an interrupt is generated.

The power supply circuit provides 3.3V power for the MOL, and simultaneously provides 2.5V, 1.8V power supply power, and the current demand is less than 200mA, and SPI/I2C expansion interface can connect more sensors.

The expansion board adopts cut straightly formula connection bluetooth, fingerprint and WIFI module, can take off when current design does not need these modules, perhaps changes for other modules as required. To reduce energy consumption.

Preferably, the core board is designed in a low power consumption mode, the double-layer module is designed, and the modules are connected in a direct-insert mode; the core board can be combined with different expansion boards according to requirements, and the optimal combination of energy consumption and functions is achieved.

In this embodiment, the first connector 4 and the second connector 6 have a pitch of 1.27MM and are located at the board edge of the main control module 2.

Example two: the USB power supply is changed into the direct power supply of a 3.3V lithium battery, and a lithium battery charging circuit is added. The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is within the scope of the present application, except that the same or similar principles and basic structures as the present application may be used.

Claims

1. A low-power consumption singlechip development board which characterized in that: the expansion board comprises a core board, an expansion board and a power supply circuit (1) for supplying power to the core board and the expansion board, wherein the core board comprises a main control module (2), a first peripheral circuit (3) and a first connector (4), and the expansion board comprises a second peripheral circuit (5) and a second connector (6);

the main control module (2) is an STM8L152R8T 6-based single chip microcomputer;

the main control module (2) is electrically connected with the first peripheral circuit (3), and the main control module (2) is also electrically connected with the first connector (4);

the second peripheral circuit (5) is interconnected with the first connector (4) by the second connector (6);

the second connector (6) is also provided with a function expansion interface.

2. The low-power-consumption singlechip development board of claim 1, characterized in that: the power supply circuit comprises a first power supply module (101), the first power supply module (101) is provided with a TTL (transistor-transistor logic) to USB (universal serial bus) circuit which is connected with a USB (universal serial bus) port to supply power to the main control module (2), the first power supply module (101) further comprises a first power supply switching circuit which is connected with the USB port, and the first power supply switching circuit is further provided with a power supply circuit which can supply power to the main control module.

3. The low-power-consumption singlechip development board of claim 2, characterized in that: the power supply circuit further comprises a second power supply module (102), the second power supply module (102) is provided with a second power supply switching circuit connected with the USB port and a power supply circuit connected with the second power supply switching circuit and supplying power to a second peripheral circuit, and the first power supply switching circuit is complementary with the second power supply switching circuit through a first connector (4) and a second connector (6).

4. The low-power-consumption singlechip development board of claim 3, characterized in that: the first peripheral circuit (3) comprises a download simulation circuit, an external clock circuit, a reset circuit, an E2PROM memory and an indicator light.

5. The low-power-consumption singlechip development board of claim 4, characterized in that: the second peripheral circuit (5) comprises a Bluetooth module, a WIFI module, an SPI/I2C expansion interface and a fingerprint module.

6. The low-power-consumption singlechip development board of claim 1, characterized in that: the first connector (4) and the second connector (6) are at a distance of 1.27MM and are positioned at the board edge of the main control module (2).