Function Codes 1, 2, 3, 4, 15 and 16
The IS4320 is an integrated circuit with a built-in Modbus RTU Master Stack, offering a standalone Modbus Master solution accessible through an I2C interface for simple microcontroller integration.
The IS4320 features two communication buses: a TTL UART for Modbus transceiver (RS485, RS422, RS232, etc.) and an I2C-Serial Interface for the microcontroller.
The aim of the IS4320 is to save engineering time and costs associated with implementing and testing the Modbus RTU communication protocol, providing a reliable solution that reduces the time-to-market (TTM) of your product.
The IS4320 also brings benefits to your microcontroller: it utilizes I2C, eliminating the need for dedicated pins since I2C can be shared with other peripherals. Additionally, it eliminates the need for timers and decreases the CPU load on the microcontroller.
The device operates at 3.3V, and its I/O pins are 5V tolerant, allowing the use of either 3.3V or 5V transceivers. It is available in two temperature ranges: Industrial (-40°C to +85°C) and Extended (-40°C to +125°C) in an easy-to-solder SO8N package.
- PLCs
- Process Control
- IIoT (Industrial Internet of Things)
- Precision Agriculture
- Building Automation
- Communications between PCBs
- Implemented Function Codes:
- FC 1 – Read Coils
- FC 2 – Read Discrete Inputs
- FC 3 – Read Holding Registers
- FC 4 – Read Input Registers
- FC 15 – Write Multiple Coils
- FC 16 – Write Multiple Holding Registers
- Available baud rates: 1200, 2400, 9600, 19200, 57600, and 115200 bps.
- Eliminates engineering time and costs for protocol implementation and testing.
- Simple and easy to use solution.
- Reduces product time-to-market (TTM).
- Reduces microcontroller CPU load.
- Reduces impact on microcontroller peripherals (no need for timers or UARTs).
- Saves microcontroller pins with a shared I2C.
- Features a small, easy-to-solder SO8N package.
- Provides a low-cost solution.
- Makes the Modbus protocol transparent.
- I2C Speeds: 100kHz, 400kHz, and 1MHz.
