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Compensated State-of-Charge (CSOC) — Address 0x2C

Reserved Registers

EEPROM Enable Register (EE_EN) — Address 0x6E

EEPROM Data Registers (EE_DATA) — Address 0x76 — 0x7F

Initial Last Measured Discharge High Byte (ILMD) — Address 0x76

Scaled EDVF Threshold (SEDVF) — Address 0x77

bq27010 , bq27210

SLUS707B – APRIL 2006 – REVISED JANUARY 2007

CSOC reports the compensated available capacity as a percentage of the last measured discharge value (LMD).

The equation is:

CSOC (%) = 100 * CAC / LMD

The host system has read-only access to this register.

Addresses 0x1E, 0x1F, 0x22-0x25, 0x2D-0x6D and 0x6F-0x75 are reserved and cannot be written by the host.

This register is used to enable host writes to EEPROM data locations (addresses 0x76 — 0x7F). The host must

write data 0xDD to this register to enable EEPROM programming. See the Programming the EEPROM section

for further information on programming the EEPROM bytes. Care should be taken to insure that no value except

0xDD is written to this location. All bqJUNIOR measurements and computations will be inhibited until 0x00 is

written back to address 0x6E.

The EEPROM data registers contain information vital to the performance of the device. These registers are to be

programmed during pack manufacturing to allow flexibility in the design values of the battery to be monitored.

The EEPROM data registers are listed in Table 2 . Detailed descriptions of what should be programmed follow.

See the Programming the EEPROM section for detailed information on writing the values to EEPROM.

Table 2. bq27010/bq27210 EEPROM Memory Map

Address Name Function

0x7F TCOMP Temperature compensation constants, OR, ID#1

0x7E DCOMP Discharge rate compensation constants, OR, ID#2

0x7D GAF/DEDV Gain Age Factor / EDVI rate compensation

0x7C PKCFG Pack configuration values

0x7B TAPER Aging estimate enable [7], charge termination taper current [6:0]

0x7A DMFSD Digital magnitude filter and self-discharge rate constants

0x79 ISLC/EDVT Initial standby load current / EDVI temperature compensation

0x78 SEDV1 Scaled EDV1 threshold

0x77 SEDVF Scaled EDVF threshold

0x76 ILMD Initial last measured discharge high byte

This register contains the scaled design capacity of the battery to be monitored. ILMD is programmed in units of

914 µ Vh per bit. The equation to calculate the initial LMD is:

ILMD = Design Capacity (mAh) * R

(m Ω ) / (256 * 3.57)

where R

is the value of the sense resistor used in the system. This value is used to initialize the high byte of

LMD on a full reset. The low byte of LMD is initialized to 0.

This register contains the scaled value of the threshold for zero battery capacity. To calculate the value to

program, use the following equation:

SEDVF = Design EDVF (mV) / 8 – 256

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