DS2786BG+T&R Maxim Integrated Products, DS2786BG+T&R Datasheet - Page 17

• Manufacturer Part Number: DS2786BG+T&R
• Description: IC FUEL GAUGE OCV-BASED 10-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of DS2786BG+T&R

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The Status/Config Register is read/write with individual
bits designated as read only. Bit values indicate status as
well as program or select device functionality. Bits 3
though 6 are EEPROM backed at memory location 7Ch.
Note that their bit positions differ between these locations.
See Figure 22:
•
•
•
Figure 22. Status/Config Register Format
Figure 23. Command Register Format
X—Reserved.
1—Bit always reads logic 1.
X—Reserved.
PORF—The power-on-reset flag is set to indicate
initial power-up. PORF is not cleared internally. The
user must write this flag value to a zero in order to
use it to indicate subsequent power-up events. POR
event causes a reset of the fuel gauge. PORF is
read/write-to-zero.
SMOD—Sleep Mode enable. A value of 1 allows the
IC to enter Sleep Mode when SCL and SDA are low
for t
Sleep Mode. This bit is EEPROM backed by bit 7 of
memory location 7Ch. The factory-programmed
value is 1.
Caution: SMOD sleep feature must be disabled
when a battery is charged on an external charger
that does not connect to the SDA or SCL pins.
SMOD sleep can be used if the charger pulls SDA
or SCL high. The IC remains in sleep on a charger
that fails to properly drive SDA or SCL and therefore
does not adjust relative capacity when a battery is
charged.
LDIS—Learn disable. A value of 1 disables cell-
capacity learning by the IC. A value of zero allows
cell-capacity learning to occur normally. This bit is
EEPROM backed by bit 6 of memory location 7Ch.
The factory-programmed value is zero.
BIT 7
BIT 7
POR
SLEEP
X
. A value of zero disables the transition to
______________________________________________________________________________________
Status/Config Register
PORF
BIT 6
BIT 6
1
Stand-Alone OCV-Based Fuel Gauge
SMOD
BIT 5
BIT 5
X
BIT 4
BIT 4
LDIS
X
ADDRESS FEh
ADDRESS 01h
•
•
•
•
The Command Register is read/write accessible. Bit val-
ues indicate operations requested to be performed by the
device. See Figure 23 for the Command Register format.
VODIS
POCV
BIT 3
BIT 3
VODIS—V
V
t
abled after the AIN1 conversion ends. This bit is
EEPROM backed by bit 5 of memory location 7Ch.
The factory-programmed value is zero.
ITEMP—ITEMP. A value of 1 enables measurement
of temperature using the internal sensor during the
AIN1 conversion timeslot. The AIN1 input is not
selected and V
timeslot. A value of zero restores the measurement
of AIN1 and enables V
This bit is EEPROM backed by bit 4 of memory
location 7Ch. The factory-programmed value is 1.
AIN1—AIN1 conversion valid. This read-only bit
indicates that the V
conversion has occurred on the AIN1 pin. When
using the VODIS bit, before reading the AIN1
Registers, read the AIN1 bit. Only once the AIN1 bit
is set should the AIN1 Register be read.
AIN0—AIN0 conversion valid. This read-only bit
indicates that the V
conversion has occurred on the AIN0 pin. When
using the VODIS bit, before reading the AIN0
Registers, read the AIN0 bit. Only once the AIN0 bit
is set should the AIN0 Register be read.
PRE
OUT
before the AIN0 conversion begins, and dis-
output. When set to zero, this output is driven
OUT
ITEMP
SOCV
BIT 2
BIT 2
OUT
disable. A value of 1 disables the
OUT
OUT
is not enabled during the AIN1
Command Register
OUT
output was enabled and a
output was enabled and a
RCALL
BIT 1
BIT 1
AIN1
during the AIN1 timeslot.
COPY
BIT 0
BIT 0
AIN0
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