Rainbow Electronics DS2705 - Manual (Page 18)

DS2705: SHA-1 Authentication Master
18 of 18
Figure 9. 1-Wire Write and Read-Time Slots
WRITE 0 SLOT WRITE 1 SLOT
t
SLOT
t
LOW0
t
SLOT
t
REC
t
LOW1
V
PULLUP
GND
Slave Sample Window
MIN TYP MAX
15 ms
2 ms
15 ms 30 ms
1 ms 3 ms
Slave Sample Window
MIN TYP MAX
15 ms
2 ms
15 ms 30 ms
1 ms 3 ms Overdrive
Standard
MODE
READ DATA SLOT
Data = 0
t
SLOT
15 ms
t
SLOT
t
REC
V
PULLUP
GND
Master Sample Window
t
RDV
15 ms
Master Sample Window
t
LOW1
Data = 1
Overdrive
Standard
MODE
2 ms 2 ms
LINE TYPE LEGEND:
Bus Master active LOW Slave active LOW
Both Bus Master and Device Resistor pullup
active LOW
t
RDV
PACKAGE INFORMATION
(For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo .)