Rainbow Electronics DS2784 User Manual
Page 8
DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
PMOD = 0
UVEN = 0
PMOD = 1
UVEN = 1
PMOD = 1
UVEN = 0
PMOD = 0
UVEN = 1
PSIO = 1
PSDQ = 1
PSIO = 1
PSDQ = 0
PSIO = 0
PSDQ = 1
PSIO = 0
PSDQ = 0
Vin < V
UV
Vin < V
UV
DQ low for t
SLEEP
DQ low for t
SLEEP
I/O Communication or
Charger Connection
I/O Communication or
Charger Connection
Pull DQ Low
Pull PIO Low
Pull PIO low
Pull DQ low
I/O Communication or
Charger Connection
I/O Communication or
Charger Connection
CONTROL REGISTER FORMAT
All control register bits are read and write accessible. The control register is recalled from parameter EEPROM
memory at power-up. Register bit values can be modified in shadow RAM after power-up. Power-up default values
are saved using the Copy Data command.
ADDRESS 60h
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
NBEN UVEN PMOD RNAOP 0 PSPIO PSDQ X
NBEN
—Negative Blanking Enable. A value of 1 enables blanking of negative current values up to 25
μV. A value of
0 disables blanking of negative currents. The power-up default of NBEN = 0.
UVEN
—Undervoltage Enable. A value of 1 allows the DS2784 to enter Sleep mode when the voltage register value
is less than V
UV
and DQ is stable at either logic level for t
SLEEP
. A value of 0 disables transitions to Sleep mode in an
undervoltage condition.
8 of 38
PMOD
—Power Mode Enable. A value of 1 allows the DS2784 to enter Sleep mode when DQ is low for t
SLEEP
. A
value of 0 disables DQ related transitions to Sleep mode.