Data Sheet

ams Datasheet Page 21
[v1-00] 2016-Dec-23 Document Feedback
CCS811 − Application Register Overview
BASELINE Register (0x11)
A two byte read/write register which contains an encoded
version of the current baseline used in Algorithm Calculations.
A previously stored value may be written back to this two byte
register and the Algorithms will use the new value in its
calculations (until it adjusts it as part of its internal Automatic
Baseline Correction).
HW_ID (Hardware identifier) Register (0x20)
Single byte read only register which holds the HW ID which is
0x81 for this family of CCS81x devices.
HW_Version (Hardware Version) Register
(0x21)
Single byte read only register which holds the Hardware Major
and Minor Hardware versions.
The top four bits read major hardware version 1 – identifying
the product as CCS811. The bottom four bits identify any build
variant. The default value is 0x1X.
FW_Boot_Version (Firmware Bootloader
Version) Register (0x23)
Two byte read only register which contain the version of the
firmware bootloader stored in the CCS811 in the format
Major.Minor.Trivial
Figure 20:
Firmware Bootloader Version Format
Byte 0 Byte 1
7654321076543210
Major Minor Trivial