Datasheet

DS1825 Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID

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SUGGESTED PROCEDURE FOR BUILDING CROSS-REFERENCE TABLE

This procedure uses the Search ROM command to find all DS1825s on the one-wire bus (16 maximum) and then

reads each configuration register to match the ROMIDs to the hard-wired addresses.

Figure 13

N>Nmax?

Master Tx

Next ROMID

Recall EEPROM

(use AD3-AD0

from Config

Match ROMID to

Address and Add

to Crossreference

Table

ROMID(0) 0000

ROMID(1) 0001

ROMID(2) 0010

ROMID(3) 0011

ROMID(12) 1100

ROMID(13) 1101

ROMID(14) 1110

ROMID(15) 1111

DONE

Crossreference Table

ROMID AD3-AD0

BUILDING

CROSSREFERENCE

TABLE USING

ROMIDS AND 4-BIT

ADDRESSES

Increment Counter

N = N + 1

Note: Temperature sensors are addressed by

ROMID, not by binary address

Search all

ROMIDs on bus &

store ROMIDs

(F0h command)

Nmax i s the number

of ROMIDs found