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BQ27500 Datasheet(PDF) 10 Page - Texas Instruments |
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BQ27500 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 39 page 4.1.1.1 Control( ): 0x00/0x01 bq27500 bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 www.ti.com Issuing a Control( ) command requires a subsequent 2-byte subcommand. These additional bytes specify the particular control function desired. The Control( ) command allows the system to control specific features of the bq27500/1 during normal operation and additional features when the bq27500/1 is in different access modes, as described in Table 4-2. Table 4-2. Control( ) Subcommands CNTL SEALED CNTL FUNCTION DESCRIPTION DATA ACCESS CONTROL_STATUS 0x0000 Yes Reports the status of DF checksum, hibernate, IT, etc. DEVICE_TYPE 0x0001 Yes Reports the device type (eg: "bq27500") FW_VERSION 0x0002 Yes Reports the firmware version on the device type HW_VERSION 0x0003 Yes Reports the hardware version of the device type Enables a data flash checksum to be generated and DF_CHECKSUM 0x0004 No reports on a read RESET_DATA 0x0005 Yes Returns reset data Reserved 0x0006 No Not to be used PREV_MACWRITE 0x0007 Yes Returns previous MAC command code Reports the chemical identifier of the Impedance Track™ CHEM_ID 0x0008 Yes configuration BOARD_OFFSET 0x0009 No Forces the device to measure and store the board offset CC_INT_OFFSET 0x000a No Forces the device to measure the internal CC offset WRITE_OFFSET 0x000b No Forces the device to store the internal CC offset SET_HIBERNATE 0x0011 Yes Forces CONTROL_STATUS [HIBERNATE] to 1 CLEAR_HIBERNATE 0x0012 Yes Forces CONTROL_STATUS [HIBERNATE] to 0 SEALED 0x0020 No Places the bq27500/1 in SEALED access mode IT_ENABLE 0x0021 No Enables the Impedance Track™ algorithm IF_CHECKSUM 0x0022 No Reports the instruction flash checksum CAL_MODE 0x0040 No Places the bq27500/1 in calibration mode RESET 0x0041 No Forces a full reset of the bq27500/1 4.1.1.1.1 CONTROL_STATUS: 0x0000 Instructs the fuel gauge to return status information to control addresses 0x00/0x01. The status word includes the following information. Table 4-3. CONTROL_STATUS Bit Definitions Flags( ) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 High byte – FAS SS CSV CCA BCA – – Low byte – HIBERNATE – SLEEP LDMD RUP_DIS VOK QEN FAS = Status bit indicating the bq27500/1 is in FULL ACCESS SEALED state. Active when set. SS = Status bit indicating the bq27500/1 is in SEALED state. Active when set. CSV = Status bit indicating a valid data flash checksum has been generated. Active when set. CCA = Status bit indicating the bq27500/1 coulomb counter calibration routine is active. Active when set. BCA = Status bit indicating the bq27500/1 board calibration routine is active. Active when set. HIBERNATE = Status bit indicating a request for entry into HIBERNATE from SLEEP mode. True when set. Default is 0. SLEEP = Status bit indicating the bq27500/1 is in SLEEP mode. True when set. LDMD = Status bit indicating the bq27500/1 Impedance Track™ algorithm is using constant-power mode. True when set. Default is 0 (constant-current mode). RUP_DIS = Status bit indicating the bq27500/1 Ra table updates are disabled. Updates disabled when set. VOK = Status bit indicating the bq27500/1 voltages are okay for Qmax. True when set. QEN = Status bit indicating the bq27500/1 Qmax updates enabled. True when set. GENERAL DESCRIPTION 10 Submit Documentation Feedback |
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