Datasheet

Store

checksum

ActiveRAM

changed?

Generatenew

checksumvalue

YES

Generate Active

RAMchecksum

value

DotheChecksum

ValuesMatch?

Re-initializeall

RAM

YES

DEVICERESET

Stored

checksum

NORMAL

OPERATION

bq27510-G2

SLUS948 –AUGUST 2010

www.ti.com

POWER CONTROL

Reset Functions

When the bq27510-G2 detects a software reset ([RESET] bit of Control( ) initiated), it determines the type of

reset and increments the corresponding counter. This information is accessible by issuing the command Control(

) function with the RESET_DATA subcommand.

As shown in Figure 4 if a partial reset was detected, a RAM checksum is generated and compared against the

previously stored checksum. If the checksum values do not match, the RAM is reinitialized (a Full Reset). The

stored checksum is updated every time RAM is altered.

Figure 4. Partial Reset Flow Diagram

Wake-Up Comparator

The wake up comparator is used to indicate a change in cell current while the bq27510-G2 is in SLEEP mode or

HIBERNATE modes. Operation Configuration uses bits [RSNS1–RSNS0] to set the sense resistor selection.

Operation Configuration also uses the [IWAKE] bit to select one of two possible voltage threshold ranges for

the given sense resistor selection. An internal interrupt is generated when the threshold is breached in either

charge or discharge directions. Setting both [RSNS1] and [RSNS0] to 0 disables this feature.