500 Holding Registers for user data
Available Function Codes:
– 0x03 Read Holding Registers
– 0x06 Write Single Register
– 0x10 Write Multiple Registers
Default Modbus Settings:
– Modbus Slave ID: 1
– Modbus Baud Rate: 19200 bps
– Modbus Parity: Even
– Modbus Stop Bits: 1
I2C Characteristics:
– I2C Slave Address: 0x11 (fixed)
– I2C Speed: 100 kHz, 400 kHz, 1 MHz
– I2C Voltage: 3.3 V (5 V tolerant)
| Qty. | Price |
|---|---|
| 1 - 9 | 1,95 € |
| 10 - 24 | 1,85 € |
| 25 - 99 | 1,70 € |
| 100 - 299 | 1,35 € |
| 300 - 499 | 1,23 € |
| 500 - 999 | 1,11 € |
| 1000 - 7999 | 1,03 € |
| 8000 + | 0,98 € |
IS4310 is a chip that integrates a Modbus RTU Slave stack. It features an internal memory of 500 Holding Registers (free for your use), accessible by both a microcontroller (via I2C) and a Modbus Master device (e.g., PLC, computer, etc.).
The available Function Codes are:
You can use the IS4310 in different ways:
Just access the Holding Register addresses you need over I2C — no libraries required.
The IS4310 offers a ready-to-use Modbus stack solution that helps reduce development time and speed up your time-to-market, while fully complying with strict T1.5 and T3.5 protocol timing requirements.
The chip provides two interfaces:
The internal memory is composed of 504 registers:
Default Modbus Settings:
119200 bpsEven1Default I2C Settings:
0x11 (fixed)100 kHz (pin 7 to GND), 400 kHz (pin 7 to 3.3V/2), 1 MHz (pin 7 to 3.3V)
This company and the products provided herein are developed independently and are not affiliated with, endorsed by, or associated with any official protocol or standardization entity. All trademarks, names, and references to specific protocols remain the property of their respective owners.
Q: What is the IS4310 chip used for?
A: To create Modbus devices (sensors and/or actuators) using serial communication such as RS-485, RS-422, RS-232, etc.
Q: Can I use 5 V transceivers?
A: Yes. The IS4310 is 5 V tolerant.
Q: Which I2C speeds and voltages are supported?
A: The IS4310 supports the three standard I2C speeds: 100 kHz, 400 kHz, and 1 MHz. The I2C bus can use either 3.3 V or 5 V pull-up voltages.
Q: Which Modbus serial configurations are supported?
A: The IS4310 supports the following Modbus serial settings:
Baud rates: 1200, 2400, 9600, 19 200, 57 600, and 115 200 bps
Parity: None, Odd, or Even
Stop bits: 1 or 2
Q: Which communication interfaces does the IS4310 support?
A: The IS4310 features an I2C interface for communication with your microcontroller, and a UART that can be connected to the desired transceiver—such as RS-485, RS-422, RS-232, optical, radio, or any other physical layer—making the chip fully flexible to your application needs.
Q: Do I need to install any Modbus libraries to use the IS4310?
A: No. The IS4310 contains a full Modbus RTU Slave stack. Your microcontroller only reads and writes the Holding Registers over I2C. No Modbus code is required on your side.
Q: Which Modbus function codes does the IS4310 support?
A: The chip supports the most commonly used Holding Register functions:
Q: How do I configure the Modbus Slave ID, baud rate, or parity?
A: These parameters are stored in dedicated non-volatile configuration registers inside the chip. You can write to these registers either via I2C from your microcontroller or via Modbus from a computer or PLC.
Q: Does the IS4310 work with STM32, ESP32, Raspberry Pi, Arduino or FPGAs?
A: Yes. Any device with an I2C interface can read and write the chip’s registers.
Q: Does the datasheet include a schematic example?
A: Yes. The IS4310 datasheet includes several examples: a standard RS485 schematic, an isolated RS485 schematic, and an RS232 schematic.
Download a Modbus RTU Master Software: qModMaster
