Designed to fit the Raspberry Pi 40-pin connector layout, this expansion board is compatible with Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+/4B models. It employs the SC16IS752 chip solution, enabling simultaneous expansion of two serial ports and 8 GPIOs. The I2C address settings and interrupt pin selection are configured via jumper caps, providing users with convenient setup options.
Product Features
- Onboard SC16IS752, can expand 2 serial ports and 8 programmable IO through I2C, does not occupy extra pins
- By changing the address jumper, up to 16 modules can be connected at the same time, that is, 32 serial ports can be expanded；
- Multiple onboard indicators, easy to check the working status of the extended serial port；
- Reserve I2C control interface for accessing to other main control boards easily.
Product Parameters
| Supply Voltage | 3.3V or 5V |
| Logic Voltage | 3.3V |
| Expansion Chip | SC16IS752 |
| Interface Protocol | I2C |
| Size | 65mm(length) x 30.5mm(width) |
Interface Introduction
The Serial Expansion Module leads out all the I2C address lines, and can set the addresses of A0 and A1 through the jumper cap. In addition, there are 6 interrupt pins, which can stack up to 16 Serial Expansion Modules. The demo codes we provide is to set the address to 0x48, setting the interrupt pin to P5 (BCM), and setting the jumper caps as follows:
* Hardware Connection : Header
* I2C_Address: A0 -> 3V3 IRQ_PIN: IRQ -> P5
* A1 -> 3V3
- ① Reserved solder pads for I2C control interface.
② Selection of interrupt pin.
③ Transmission and reception indicator lights for Serial Port A.
④ Header pins for Serial Port A.
⑤ I2C address A0 configuration.
⑥ I2C address A1 configuration.
⑦ Header pins for Serial Port B.
⑧ Power indicator light.
⑨ Transmission and reception indicator lights for Serial Port B.
⑩ Reserved solder pads for GPIO ports.
⑪ Raspberry Pi 40-pin female header.
WIKI
Package Contents
- Serial Expansion Module x 1
- Accessory pack
2 