參數(shù)資料
型號(hào)： bq2011K
廠商： Benchmark Technology Group
英文描述： Gas Gauge IC for High Discharge Rates(用于高放電率的氣體Gauge芯片)
中文描述： 氣體計(jì)IC，高放電率（用于高放電率的氣體計(jì)芯片）
文件頁(yè)數(shù)： 9/20頁(yè)
文件大小： 175K
代理商： BQ2011K
logic-low state for a period, t
STRH,B
. The next section is the
actual data transmission, where the data should be valid by
a period, t
DSU
, after the negative edge used to start commu-
nication. The data should be held for a period, t
DV
, to allow
thehostorbq2011Ktosamplethedatabit.
The final section is used to stop the transmission by return-
ing the DQ pin to a logic-high state by at least a period,
t
SSU
, after the negative edge used to start communication.
The final logic-high state should be held until a period, t
SV
,
to allow time to ensure that the bit transmission was
stopped properly. The timings for data and break communi-
cation are given in the serial communication timing specifi-
cationandillustrationsections.
Communication with the bq2011K is always performed
with the least-significant bit being transmitted first.
Figure 3 shows an example of a communication se-
quence to read the bq2011K NAC register.
bq2011K Registers
The bq2011K command and status registers are listed in
Table 5 and described below.
Command Register (CMDR)
The write-only CMDR register is accessed when eight
valid command bits have been received by the bq2011K.
The CMDR register contains two fields:
I
W/R bit
I
Command address
The W/R bit of the command register is used to select
whether the received command is for a read or a write
function.
The W/R values are:
Where W/R is:
0
The bq2011K outputs the requested regis-
ter contents specified by the address por-
tion of CMDR.
1
The following eight bits should be written
to the register specified by the address por-
tion of CMDR.
The lower seven-bit field of CMDR contains the address
portion of the register to be accessed. Attempts to write
to invalid addresses are ignored.
Primary Status Flags Register (FLGS1)
The read-only FLGS1 register (address=01h) contains
the primary bq2011K flags.
9
bq2011K
TD201103.eps
DQ
Break
0 0 0 0 0 0
1 0 1 0 0 1
Written by Host to bq2011K
CMDR = 03h
Received by Host to bq2011K
NAC = 65h
LSB
MSB
LSB
MSB
1
1
1 0
Figure 3. Typical Communication With the bq2011K
CMDR Bits
7
6
5
4
3
2
1
0
-
AD6 AD5
AD4
AD3
AD2
AD1
AD0
(LSB)
CMDR Bits
7
6
5
4
3
2
1
0
W/R
-
-
-
-
-
-
-
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