SLUUC54C February 2020 – March 2024 BQ27Z558 , BQ27Z561 , BQ27Z561-R2
This 4-byte value, which is the system runtime in seconds, can be read or written. Always begin the read operation at 0x36 (the LSB) to keep the bytes synchronized during the read by copying the gauge clock to the time stamp registers. The host should read bytes into its 32-byte unsigned integer format in the appropriate endianness. When written by the host, the gauge will update its internal clock on the write to register 0x39.
| I2C Cmd | Name | Access | Proto- col | Type | Min | Max | Unit | Note | ||
|---|---|---|---|---|---|---|---|---|---|---|
| SE | US | FA | ||||||||
| 0x36/37 | TimeStampUpper() | R | RW | RW | Word | U2 | 0 | 65535 | s | |
| I2C Cmd | Name | Access | Proto- col | Type | Min | Max | Unit | Note | ||
|---|---|---|---|---|---|---|---|---|---|---|
| SE | US | FA | ||||||||
| 0x38/39 | TimeStampLower() | R | RW | RW | Word | U2 | 0 | 65535 | s | |