> For the complete documentation index, see [llms.txt](https://inacks.gitbook.io/inacks-is3720-i2c-dmx+rdm-receiver-ic/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/inacks-is3720-i2c-dmx+rdm-receiver-ic/datasheet/memory-map/chip_id.md).

# CHIP\_ID

> This page is not the authoritative source for design information. The official [IS3720 datasheet](https://www.inacks.com/is3720) published on [www.inacks.com](http://www.inacks.com) is the authoritative reference: always consult it for the latest information.

The CHIP\_ID register contains the chip identifier, which is a fixed value of 152. This value is used for production tracking. It is stored in ROM and will not change throughout the product's life-cycle.

Since this register value is constant, reading it during firmware development can help verify that I2C communications are working and that the chip’s memory can be properly read.

This register is read-only.

* **Name:** CHIP\_ID
* **Description:** Chip Identification Number
* **Address:** 513
* **Memory Type:** ROM
* **Value:** 152
* **Accessible by:** I2C (Read Only)

| Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
| ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- |
| 0     | 0     | 0     | 1     | 0     | 1     | 1     | 0     |