Rainbow Electronics DS2405 - Manual (Page 4)

DS2405
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BUS MASTER CIRCUIT Figure 3
A) Open Drain
TRANSACTION SEQUENCE
The sequence for accessing the DS2405 via the 1-Wire port is as follows:
§ Initialization
§ ROM Function Command
§ Read Data
INITIALIZATION
All transactions on the 1-Wire bus begin with an initialization sequence. The initialization sequence
consists of a Reset Pulse transmitted by the bus master followed by a Presence Pulse(s) transmitted by the
slave(s).
The Presence Pulse lets the bus master know that at least one DS2405 is on the bus and is ready to
operate. For more details, see the “1-Wire Signaling” section.
B) Standard TTL
To data connection
of DS2405
To data connection
of DS2405