BQ27350 Datasheet, PDF (15/33 Pages) Texas Instruments – Single Cell Li-Ion Battery Manager With Impedance Track Fuel Gauge Technology

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bq27350
Single Cell Li-Ion Battery Manager
With Impedance Track Fuel Gauge Technology
SLUS754 – MARCH 2007
4.2.4 DataFlashBlock( ): 0x3f
UNSEALED Access: This command sets the data flash block to be accessed. When “0x00” is written to
BlockDataControl( ), DataFlashBlock( ) holds the block number of the data flash to be read or written.
Example: writing a 0x00 to DataFlashBlock( ) specifies access to the first 32 byte block and a 0x01
specifies access to the second 32 byte block, and so on.
SEALED Access: This command directs which data flash block will be accessed by the BlockData( )
command. Writing a 0x00 to DataFlashBlock( ) specifies the BlockData( ) command will transfer
authentication data. Issuing a 0x01, 0x02 or 0x03 instructs the BlockData( ) command to transfer
Manufacturer Info Blocks A, B, or C, respectively.
4.2.5 AuthenticateData/BlockData( ): 0x40…0x53
UNSEALED Access: This data block has two functions. It is used for the authentication challenge and
response and is part of the 32 byte data block when accessing data flash.
SEALED Access: It is used for the authentication challenge and response and is part of the 32 byte data
block when accessing Manufacturer Info Blocks A, B, or C.
4.2.6 AuthenticateChecksum/BlockData( ): 0x54
UNSEALED Access: This byte holds the authenticate checksum when writing the authentication challenge
to the bq27350 and is part of the 32 byte data block when accessing data flash.
SEALED Access: This byte holds the authenticate checksum when writing the authentication challenge to
the bq27350 and is part of the 32 byte data block when accessing Manufacturer Info Blocks A, B, or C.
4.2.7 BlockData( ): 0x55…0x5f
UNSEALED Access: This data block is the remainder of the 32 byte data block when accessing data
flash.
SEALED Access: This data block is the remainder of the 32 byte data block when accessing
Manufacturer Info Blocks A, B, or C.
4.2.8 BlockDataChecksum( ): 0x60
UNSEALED Access: This byte contains the checksum for the 32 bytes of block data read or written to
data flash.
SEALED Access:This byte contains the checksum for the 32 bytes of block data written to Manufacturer
Info Blocks B or C.
4.2.9 BlockDataControl( ): 0x61
UNSEALED Access: This command is used to control data flash access. Writing 0x00 to this command
enables BlockData( ) to access general data flash. Writing a 0x01 to this command enablesBlockData( ) to
access authentication challenge and response.
SEALED Access: This command is not available in SEALED mode.
4.2.10 DeviceNameLength( ): 0x62
UNSEALED and SEALED Access: This byte contains the length of the Device Name.
4.2.11 DeviceName( ): 0x63…0x69
UNSEALED and SEALED Access: This block contains the device name that is programmed in Device
Name.
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GENERAL DESCRIPTION
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