DS2482-100 Datasheet, PDF (12/24 Pages) Dallas Semiconductor – Single-Channel 1-Wire Master

Single-Channel 1-Wire Master
t_WOL
t_MSR
V_CC
V_IH1
V_IL1
0V
t_F1
t_SLOT
t_REC0
PULLUP (SEE FIGURE 2)
DS2482-100 PULLDOWN
Figure 5. Write-Zero Time Slot
t_MSR
t_W1L
V_CC
V_IH1
V_IL1
0V
t_F1
t_SLOT
PULLUP (SEE FIGURE 2)
DS2482-100 PULLDOWN
1-Wire SLAVE PULLDOWN
NOTE: DEPENDING ON ITS INTERNAL STATE, A 1-Wire SLAVE DEVICE TRANSMITS DATA TO ITS MASTER (e.g. THE DS2482-100). 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.
Figure 6. Write-One and Read-Data Time Slot
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