
DS2775/DS2776/DS2777/DS2778
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
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RESISTOR PULLUP
BUS MASTER ACTIVE LOW
LINE TYPE LEGEND:
SLAVE ACTIVE LOW
BOTH BUS MASTER AND
SLAVE ACTIVE LOW
t
SLOT
t
LOW0
t
REC
t
REC
t
LOW1
> 1μs
> 1μs
t
SLOT
t
SLOT
t
RDV
t
RDV
30μs15μs
3μs2μs
15μs
2μs
15μs
2μs
1μs
t
SLOT
V
PULLUP
WRITE-ZERO SLOT WRITE-ONE SLOT
READ-ZERO SLOT READ-ONE SLOT
GND
V
PULLUP
GND
MASTER SAMPLE WINDOW MASTER SAMPLE WINDOW
MODE:
STANDARD
MODE:
OVERDRIVE
STANDARD
OVERDRIVE
DEVICE SAMPLE WINDOW
MIN TYP MAX
DEVICE SAMPLE WINDOW
MIN TYP MAX
15μs 30μs15μs
3μs2μs 1μs
15μs
Figure 30. 1-Wire Write and Read Time Slots
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