ZHCSE08D May 2015 – January 2020 TMP107
PRODUCTION DATA.
The G/nI bit indicates if the communication is a global operation (intended for more than one device) or individual (intended for only one device).
All command operations are global; therefore, for command operations, always set the G/nI bit to 1.
For read and write address operations to multiple devices in the daisy chain simultaneously, set this bit to 1. To access an individual device, set the G/nI bit to 0.
During global operation, the host sets the address portion of the command to the maximum address required to perform the communication. For example, to perform a write to the high-limit register of all devices between addresses 1h to 5h in the daisy chain, set the G/nI bit to 1 and the address field to 5h. For individual accesses, set the address field to the desired device address.