Placa de Desenvolvimento sem Fio Ch573 Risc-v Aplicação Core Ble Mcu

CH573F evaluation board with Bluetooth antenna, indicator light, USB interface socket and chip universal interface pin, suitable for customer basic function testing and verification.

The CH573 is a 32-bit RISC microcontroller with integrated BLE wireless communication. On chip integrated low power Bluetooth BLE communication module, full speed USB host and device controller and transceiver, SPI, 4 serial ports, ADC, touch key detection module, RTC and other rich peripheral resources.

The CH573 assessment board comes with the following resources:

1. Switch S1: Power supply switch, used to disconnect or connect the external 5V power supply or USB power supply.

2. Button RESET: The reset button is used for external manual reset (note that the manual reset function of the chip must be enabled).

3. Press DOWNLOAD: The download button is used for ISP download.

4. USB port P1: USB communication port for the main chip, providing the Host and Device functions.

5. Insert P2/P3: Includes chip function, power supply, and LED load operation pins.

This section describes the CH573 antenna

The following provides a design example of 2.4GHz small-size PCB antenna matching CH573 chip. The specific parameters of antenna painting can be designed by referring to the PCB diagram provided by our company.

1. Perform 50 ohm impedance matching when wiring the chip pin to the antenna feed point (area A in the figure above). The counting factor will involve the line width of region A, the distance between A and B, plate thickness, plate dielectric constant, copper thickness, green oil thickness and other parameters.

2. Area B in the figure above is a coplanar reference ground, and adequate area and number of ground holes should be ensured in this area as far as possible.

3. The grounding pad at the bottom of the chip (area C in the figure above) shall ensure good grounding and heat dissipation (multiple ground holes) as permitted by the manufacturing process.

4. Keep the radio part away from interference sources, such as crystals, power components, and switching power supplies.

Figure 2-1 shows the antenna style of our company’s evaluation board. PCB board thickness is 0.8mm

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