Datasheet

16Maxim Integrated
DS2483
Single-Channel 1-Wire Master
with Adjustable Timing and Sleep Mode
Figure 6. Write-One and Read-Data Time Slot
Figure 5. Write-Zero Time Slot
PULLUP (SEE FIGURE 2) DS2483 PULLDOWN 1-Wire SLAVE PULLDOWN
V
CC
V
IH1
V
IL1
0V
t
SLOT
t
W1L
t
MSR
t
F1
NOTE: DEPENDING ON ITS INTERNAL STATE, A 1-Wire SLAVE DEVICE TRANSMITS DATA TO ITS MASTER (e.g., THE DS2483). WHEN RESPONDING WITH A 0,
A 1-Wire SLAVE STARTS PULLING THE LINE LOW DURING t
W1L
. ITS INTERNAL TIMING GENERATOR DETERMINES WHEN THIS PULLDOWN ENDS AND THE VOLTAGE
STARTS RISING AGAIN. WHEN RESPONDING WITH A 1, A 1-Wire SLAVE DOES NOT HOLD THE LINE LOW AT ALL, AND THE VOLTAGE STARTS RISING AS SOON AS t
W1L
IS OVER. 1-Wire DEVICE DATA SHEETS USE THE TERM t
RL
INSTEAD OF t
W1L
TO DESCRIBE A READ-DATA TIME SLOT. TECHNICALLY, t
RL
AND t
W1L
HAVE IDENTICAL
SPECIFICATIONS AND CANNOT BE DISTINGUISHED FROM EACH OTHER.
PULLUP (SEE FIGURE 2) DS2483 PULLDOWN
V
CC
V
IH1
V
IL1
0V
t
SLOT
t
R
EC0
t
WOL
t
MSR
t
F1