Rainbow Electronics DS2778 - Manual (Page 41)

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
> 1 μs
> 1 μs
t SLOT t SLOT
t RDV t RDV
30 μs 15 μs
3 μs 2 μs
15 μs
2 μs
15 μs
2 μs
1 μs
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
15 μs 30 μs 15 μs
3 μs 2 μs 1 μs
15 μs
Figure 30. 1-Wire Write and Read Time Slots