- Serial port expansion chip: SC16IS752
- RS485 transceiver： SP3485
- RS232 transceiver： SP3232
- Communication Interface： SPI
- Communication rate： 300~921600 bps
- Operating Voltage： 3.3/5V
- Dimension： 65mm × 56.5mm
- Via diameter： 3.0mm
Product Description
RS485 RS232 HAT is an isolated RS485 and RS232 expansion board specially designed by Waveshare for Raspberry Pi. It adopts SC16IS752+SP3485, SP3232 scheme, built-in power isolation, ADI magnetic coupling isolation and TVS and other protection circuits.
Feature :
- Based on Raspberry Pi 40pin GPIO interface, suitable for Raspberry Pi series boards.
- Using SC16IS752 and SP3485, SP3232 multi-chip combination scheme, can realize SPI to RS485, RS232, the communication rate is up to 921600bps.
- RS485 supports manual or automatic sending and receiving of data, which can be set by DIP switch.
- RS485 onboard resettable fuse and protection diode can ensure stable output of current and voltage, prevent overcurrent and overvoltage, and improve shock resistance.
- Onboard TVS (transient voltage suppression tube), which can effectively suppress the surge voltage and transient peak voltage in the circuit, and protect against lightning and static electricity.
- Onboard power supply and serial port transceiver indicators, easy to check the module power supply and communication status.
- Lead out the SPI control interface for easy access to main control boards such as Arduino.
- Provide complete supporting information manuals (C and python sample programs and user manuals, etc.).
Product parameters
- Serial port expansion chip: SC16IS752
- RS485 transceiver： SP3485
- RS232 transceiver： SP3232
- Communication Interface： SPI
- Communication rate： 300~921600 bps
- Operating Voltage： 3.3/5V
- Dimension： 65mm × 56.5mm
- Via diameter： 3.0mm
Interface Description
- Pin function
| Pin Number | Identification | Pin Description |
| 1 | VCC | 3.3V/5V Power |
| 2 | GND | GND |
| 3 | SCLK | SPI clock input |
| 4 | MOSI | SPI data input |
| 5 | MISO | SPI data output |
| 6 | CS | SPI Chip select signal |
| 7 | IRQ | interrupt output |
| 8 | EN | RS485 output enable |
Package Included :
1 X Isolated RS485 RS232 Expansion HAT