BQ2084-V140_14 Datasheet, PDF (32/64 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

bq2084-V140
SLUS664B – JULY 2005 – REVISED AUGUST 2006
www.ti.com
Table 13. State and Status Bit Summary
State
wakeup
precharge
chargesusp
terminatecharge
normalcharge
provisionalcharge
normaldischarge
depleted
depleted_ac
overheatdischarge
overheatcharge
battfail_overcharge
battfail_lowtemp
battfail_chargeterminate
battfail_afe_chg
battfail_afe_dsg
battfail_chg
battfail_dsg
removed
sleep
permanent_failure
MAC Mode (MSB)
0x00 Wake up
0x03 Precharge
0x04 Charge Suspension
0x07 Charge Terminate
0x05 Charge
0x01 Normal
0x0e System Present
0x08 Fault Charge Terminate
0x0c Battery Failure
0x0a Over Current
0x0f Battery Out
0x0d Sleep
0x09 Permanent Failure
CC()
0
PC
FC
MC
FC ⁽⁵⁾
0
FC
PC
PC
FC
FC
0
0
0
0
FC
0
FC
FC
0
0
CV()
0
CV
CV
CV
CV
0
CV
CV
CV
CV
CV
0
0
0
0
CV
0
CV
CV
0
0
CHG
FET ⁽¹⁾
off ⁽²⁾
of ⁽²⁾f
off
off
on
off
on
off
off
off
off
off
off
off
off
off ⁽⁶⁾
off
off ⁽⁶⁾
off
off
off
DSG FET
on
on
on
on
on
on
on
off
off
off
off
on
on
on
of ⁽⁶⁾f
off
off ⁽⁶⁾
off
off
off⁽⁷⁾
off
ZVCHG
FET
on ⁽³⁾
on ⁽⁴⁾
off
off
off
off
off
off
off⁽⁽⁴⁾⁾
off
off
off
off
off
off
off
off
off
off
off
off
FUSE
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
blow
Power
Mode
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
normal
low
low
(1) CHG FET always on if discharge current greater than Discharge Detection Current (DF 0x115, 0x116)
(2) On if FET Config = 01 (Common precharge, charge FET)
(3) ZVCHG FET on, OD FET off if FET Config = 00 or 02 (ZVCHG FET or precharge FET)
(4) ZVCHG FET on, OD FET off if FET Config = 00 (ZVCHG FET), or ZVCHG FET off, OD FET on if FET Config = 02 (precharge FET)
(5) 0 if CVOV or PC is not CVOV and minimum cell voltage is less than the precharge cell voltage threshold
(6) If MiscConfig.Nonremoveable Battery is set, then FET is on.
RemainingCapacityAlarm() (0x01)
Description: Sets or gets the low-capacity threshold value. Whenever the RemainingCapacity() falls below the
low-capacity value, the bq2084-V140 sends AlarmWarning() messages to the SMBus host with the
REMAINING_CAPACITY_ALARM bit set. A low-capacity value of 0 disables this alarm. The bq2084-V140
initially sets the low-capacity value to Remaining Capacity Alarm value programmed in DF 0x02-0x03. The
low-capacity value remains unchanged until altered by the RemainingCapacityAlarm() function. The low-capacity
value may be expressed in either current (mA) or power (10 mWh) depending on the setting of the
BatteryMode() CAPACITY_MODE bit.
Purpose: The RemainingCapacityAlarm() function can be used by systems that know how much power they
require to save their operating state. It enables those systems to more finely control the point at which they
transition into suspend or hibernate state. The low-capacity value can be read to verify the value in use by the
bq2084-V140 low-capacity alarm.
SMBus protocol: Read or write word
Input/Output: Unsigned integer-value below which Low Capacity messages are sent.
Units
Range
Granularity
Accuracy
BATTERY MODES
CAPACITY_MODE
BIT = 0
CAPACITY_MODE
BIT = 1
mAh at C/5
10 mWh at P/5
0-65,535 mAh
0-65,535 10 mWh
Not applicable
See RemainingCapacity()
32
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