> For the complete documentation index, see [llms.txt](https://inacks.gitbook.io/is4310-wiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://inacks.gitbook.io/is4310-wiki/datasheet/memory-description/memory-map-table.md).

# Memory Map Table

> This page is not the authoritative source for design information. The official [IS4310 datasheet](https://www.inacks.com/is4310) published on [www.inacks.com](http://www.inacks.com) is the authoritative reference: always consult it for the latest information.

<table><thead><tr><th width="130">I2C Register Address</th><th width="150">Modbus Register Address</th><th width="170">Register Name</th><th>Register Description</th></tr></thead><tbody><tr><td>0</td><td>0</td><td>HOLD0</td><td>Holding Register 0</td></tr><tr><td>1</td><td>1</td><td>HOLD1</td><td>Holding Register 1</td></tr><tr><td>2</td><td>2</td><td>HOLD2</td><td>Holding Register 2</td></tr><tr><td>3</td><td>3</td><td>HOLD3</td><td>Holding Register 3</td></tr><tr><td>4</td><td>4</td><td>HOLD4</td><td>Holding Register 4</td></tr><tr><td>5</td><td>5</td><td>HOLD5</td><td>Holding Register 5</td></tr><tr><td>…</td><td>…</td><td>(HOLD6 to HOLD493)</td><td>…</td></tr><tr><td>494</td><td>494</td><td>HOLD494</td><td>Holding Register 494</td></tr><tr><td>495</td><td>495</td><td>HOLD495</td><td>Holding Register 495</td></tr><tr><td>496</td><td>496</td><td>HOLD496</td><td>Holding Register 496</td></tr><tr><td>497</td><td>497</td><td>HOLD497</td><td>Holding Register 497</td></tr><tr><td>498</td><td>498</td><td>HOLD498</td><td>Holding Register 498</td></tr><tr><td>499</td><td>499</td><td>HOLD499</td><td>Holding Register 499</td></tr><tr><td>500</td><td>500</td><td>MBADR</td><td>Configuration Register, Slave Address Configuration</td></tr><tr><td>501</td><td>501</td><td>MBBDR</td><td>Configuration Register, Baud Rate Configuration</td></tr><tr><td>502</td><td>502</td><td>MBPAR</td><td>Configuration Register, Parity Bit Configuration</td></tr><tr><td>503</td><td>503</td><td>MBSTP</td><td>Configuration Register, Stop Bits Configuration</td></tr></tbody></table>