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8.4
The EEPROM Screen
8.5
The Pro Screen
Operation
The EEPROM screen allows the user to read and write the 10 EEPROM registers of bq27x10. A changing
of the status of the checkbox for Enable LMD Agingcauses an automatic write to the EEPROM to ensure
that the selection applies accordingly. When writing to the EEPROM, always ensure that the 21-V pulse to
PROG pin is available.
The Taper Current EEPROM register includes the Taper Current value (bits 0-6) and the Enable Last
Measure Discharge Aging (bit 7). When registers are displayed with engineering units, the value shown for
Taper Current is just taking in consideration bits 0-6. The user must rely on the Enable LMD Aging check
box to determine this feature. When registers are not displayed in engineering units, the value shown for
Taper Current includes all 8 bits of this register represented in hexadecimal numbers.
If either the DCFIX or TCFIX bits in the Pack Configuration EEPROM register are set, then the DCOMP or
TCOMPis illustrated as Customer ID # accordingly. For example, if DCFIX bit is set, then the DCOMP
register is set as a customer ID and the default discharge rate compensation is used by the bq27x10
regardless of the contents of the DCOMP register.
The EEPROM screen has two grids. The one to the right is the data that is contained in the EEPROM
(addresses 0x76-0x7F) and RAM registers corresponding to EEPROM (addresses 0x46-0x4F).
The Pro screen allows the data location in the bq27x10 to be addressed individually by entering the
address to be read or the address and data to be written. This screen can be helpful when evaluating
commands that are used in host-side gauge applications.
Figure 11. Pro Screen
14
bq27x10EVM Single-Cell Battery Fuel Gauge
SLUU259 – October 2006
Evaluation Module
