MLAB
Module
mlab mlab-module

I2CSPI01

Allows connection of SPI devices to I2C bus and is capable co handle up to four SPI slaves. Not used chip-select pins can be used as GPIO pins.

This is an open-source hardware design, one of the modules from the MLAB labolatory system.

I2CSPI01 - I2C to SPI bridge

I2CSPI01A

The I2CSPI01 module is designed for systems where a microcontroller with only an I2C interface needs to communicate with one or more SPI peripherals. It acts as a bridge that translates I2C commands into SPI signals, allowing integration of SPI devices such as ADCs, DACs, memory chips, or sensors into an I2C-based architecture. This simplifies wiring and reduces the number of required signals.

Features

  • I2C to SPI bridge based on SC18IS602B
  • Supports up to four SPI slave devices
  • Unused chip-select pins configurable as GPIO
  • SPI clock modes: 0, 1, 2, 3
  • SPI speed configurable: 58 kHz to 1.843 MHz
  • GPIOs support multiple modes: quasi-bidirectional, push-pull, input-only, open-drain
  • 200-byte internal buffer
  • Operates as I2C slave and SPI master
  • 3.3V supply voltage

Specifications

Parameter Value
Power Supply Max. 3.6 V
Dimensions 40.13 x 30.00 x 16 mm
Interface I2C (up to 400 kHz), SPI (up to 1.843 MHz)
IC Used SC18IS602B

Assembly Notes

  • One via must be drilled due to a PCB short.
  • J5 header is not functional due to PCB layout issue.

Resources