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BQ28Z560-R1 数据表(PDF) 52 Page - Texas Instruments

部件名 BQ28Z560-R1
功能描述  Single Cell Li-Ion Battery Gas Gauge and Protection
PDF  60 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

BQ28Z560-R1 数据表(HTML) 52 Page - Texas Instruments

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background image
A
A
S
0
ADDR[6:0]
CMD[7:0]
Sr
1
ADDR[6:0]
A
DATA [7:0]
A
DATA [7:0]
P
N
A
A
S
A
0
P
ADDR[6:0]
CMD[7:0]
DATA [7:0]
DATA [7:0]
A
66ms
A
A
S
0
ADDR[6:0]
CMD[7:0]
Sr
1
ADDR[6:0]
A
DATA [7:0]
A
DATA [7:0]
A
DATA [7:0]
A
DATA [7:0]
P
N
Waitingtimebetweencontrolsubcommandandreadingresults
Waitingtimebetweencontinuousreadingresults
66ms
66ms
S
ADDR[6:0]
0
A
CMD[7:0]
A Sr
ADDR[6:0]
1
A
DATA[7:0]
A
...
DATA[7:0]
N P
Address
0x7F
DataFrom
addr0x7F
DataFrom
addr0x00
bq28z560-R1
SLUSBD3 – APRIL 2013
www.ti.com
Incremental read at the maximum allowed read address:
The I2C engine releases both SDA and SCL if the I2C bus is held low for t(BUSERR). If the gas gauge was holding
the lines, releasing them frees the master to drive the lines. If an external condition is holding either of the lines
low, the I2C engine enters the low-power SLEEP mode.
I2C Timeout
The I2C engine will release both SDA and SCL if the I2C bus is held low for about 2 s. If the bq28z560-R1 was
holding the lines, releasing them will free the master to drive the lines.
I2C Command Waiting Time
To ensure getting the correct results of a command with the 400 KHz I2C operation, a proper waiting time should
be added between issuing the command and reading results. For subcommands, the following diagram shows
the waiting time required between issuing the control command and reading the status with the exception of the
checksum command. A 100-ms waiting time is required between the checksum command and reading result. For
read-write standard commands, a minimum of 2 s is required to get the result updated. For read-only standard
commands, there is no waiting time required, but the host should not issue all standard commands more than
two times per second. Otherwise, the gauge could result in a reset issue due to the expiration of the watchdog
timer.
The I2C clock stretch could happen in a typical application. A maximum 80-ms clock stretch could be observed
during the flash updates. There can be up to a 270-ms clock stretch after the OCV command is issued.
52
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Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: bq28z560-R1



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