BQ2060SS Datasheet, PDF (20/59 Pages) Texas Instruments – SBS V1.1-COMPLIANT GAS GAUGE IC

bq2060
SLUS035E – JANUARY 2000 – REVISED OCTOBER 2005
ManufacturerAccess() (0x00); [0x00–0x01]
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DESCRIPTION
This function provides writable command codes to control the bq2060 during normal operation and
pack manufacture. These commands can be ignored if sent within one second after a device reset.
The following list of commands are available.
0x0618 ENABLE LOW-POWER STORAGE MODE: Activates the low-power storage mode. The bq2060 enters
the storage mode after a 5- to 8-s delay. The bq2060 accepts other commands to
ManufacturerAccess() during the delay before entering low-power storage mode. The LEDs must
be off before entering the low-power storage mode as the display state remains unchanged. During
the delay following the low-power storage command, a VFC Calibration command may be issued.
The bq2060 clears the ManufacturerAccess() command within 900 ms of acknowledging the Enable
Low-Power Storage command. The VFC Calibration command must be sent 900–1600 ms after
SMBus acknowledgment of the Enable Low-Power Storage command. In this case, the bq2060
delays entering storage mode until the calibration process completes and the bq2060 stores the
new calibration values in EEPROM.
0x062b SEAL COMMAND: Instructs the bq2060 to restrict access to those functions listed in Table 3.
NOTE:
The SEAL Command does not change the state of the SEAL bit in Pack Configuration
in EEPROM. The bq2060 completes the seal function and clears
ManufacturerAccess() within 900 ms of acknowledging the command.
0x064d CHARGE SYNCHRONIZATION: Instructs the bq2060 to update RM to a percentage of FCC as defined
in Fast Charge Termination %. The bq2060 updates RM and clears ManufacturerAccess() within
900 ms of acknowledging the command.
0x0653 ENABLE VFC CALIBRATION: Instructs the unsealed bq2060 to begin VFC calibration. With this
command, the bq2060 deselects the SR₁ and SR₂ inputs and calibrates for IC offset only. It is best
to avoid charge or discharge currents through the sense resistor during this calibration process.
0x067e ALTERNATE VFC CALIBRATION: Instructs the unsealed bq2060 to begin VFC calibration. With this
command, the bq2060 does not deselect the SR₁ and SR₂ inputs and calibrates for IC and PCB
offset. During this procedure no charge or discharge currents occur.
During VFC calibration, the bq2060 disables the LED display and accepts only the Stop VFC
Calibration and the SEAL Command to ManufacturerAccess(). The bq2060 disregards all other
commands. SMBus communication should be kept to a minimum during VFC calibration to reduce
the noise level and allow a more accurate calibration.
Once started, the VFC calibration procedure completes automatically. When complete, the bq2060
saves the calibration values in EEPROM. The calibration normally takes about 8 to 10 minutes. The
calibration time is inversely proportional to the bq2060 VFC (and PCB) offset error. The bq2060
caps the calibration time at one hour in the event of calibrating a zero-offset error. The VFC
calibration can be done as the last step in a battery pack test procedure because the calibration
can complete automatically after removal from a test setup.
The bq2060 clears ManufacturerAccess() within 900 ms and starts calibration within 3.2 s of
acknowledging the command.
0X0660 STOP VFC CALIBRATION: Instructs the bq2060 to abort a VFC calibration procedure. If aborted, the
bq2060 disables offset correction. The bq2060 stops calibration within 20 ms of acknowledging the
command.
0X0606 PROGRAM EEPROM: Instructs the unsealed bq2060 to connect the SMBus to the EEPROM I²C bus.
The bq2060 applies power to the EEPROM within 900 ms of acknowledging the command. After
issuing the program EEPROM command, the bq2060 monitoring functions are disabled until the I²C
bus is disconnected. The bq2060 disconnects the I²C bus when it detects that the Battery Address
0x16 is sent over the SMBus. The Battery Address 0x16 to disconnect the I²C bus should not be
sent until 10 ms after the last write to the EEPROM.
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