BQ2013H Datasheet, PDF (10/24 Pages) Texas Instruments – Gas Gauge IC for Power- Assist Applications

bq2013H
Table 8. bq2013H Current-Sensing Errors
Symbol
INL
INR
Parameter
Integrated non-linearity
error
Integrated non-
repeatability error
Typical
±2
±1
Maximum
±4
±2
Units
%
%
Notes
Add 0.1% per °C above or below 25°C
and 1% per volt above or below 4.25V.
Measurement repeatability given
similar operating conditions.
munication timing specification and illustration sec-
tions.
Communication with the bq2013H is always performed
with the least-significant bit being transmitted first. Fig-
ure 3 shows an example of a communication sequence to
read the bq2013H NACH register.
bq2013H Command Code and
Registers
The bq2013H status registers are listed in Table 9 and
described below.
Command Code
The bq2013H latches the command code when eight
valid command bits have been received by the bq2013H.
The command code register contains two fields:
I W/R bit
I Command address
The W/R bit of the command code is used to select
whether the received command is for a read or a write
function.
The W/R location is:
Command Code Bits
7
65
4
3
2
1
0
W/R - -
-
-
-
-
-
Where W/R is:
0 The bq2013H outputs the requested regis-
ter contents specified by the address por-
tion of command code.
1 The following eight bits should be written
to the register specified by the address por-
tion of command code.
The lower seven-bit field of command code contains the
address portion of the register to be accessed. Attempts
to write to invalid addresses are ignored.
Command Code Bits
765 4
3
2
1
0
-
AD6 AD5 AD4
AD3
AD2
AD1
AD0
(LSB)
Written by Host to bq2013H Received by Host from bq2013H
CMDR = 03h
NAC = 65h
LSB
MSB LSB
MSB
Break 1 1 0 0 0 0 0 0 1 0 1 0 0 1 1 0
DQ
t_RSPS
TD2013H.eps
Figure 3. Typical Communication With the bq2013H
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