Datasheet

DS1904
10 of 13
READ/WRITE TIMING DIAGRAM F
igure 9
Write-one Time Slot
15µs
60µs
DS1904
Sampling Window
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
t
LOW1
60 µs
≤
t
SLOT
< 120 µs
1 µs
≤
t
LOW1
< 15 µs
1 µs
≤
t
REC
<
∞
RESISTOR
MASTER
Write-zero Time Slot
15µs
RESISTOR
MASTER
DS1904
60µs
t
LOW0
Sampling Window
60 µs
≤
t
LOW0
< t
SLOT
< 120 µs
1 µs
≤
t
REC
<
∞
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
Read-data Time Slot
RESISTOR
MASTER
DS1904
Master
Sampling Window
60 µs
≤
t
SLOT
< 120 µs
1 µs
≤
t
LOWR
< 15 µs
0
≤
t
RELEASE
< 45 µs
1 µs
≤
t
REC
<
∞
t
RDV
= 15 µs
t
SU
< 1 µs
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
t
LOWR
t
SU
t
RDV
t
RELEASE