Datasheet

1-Wire Digital Thermometer with
Sequence Detect and PIO
DS28EA00
Maxim Integrated 21
MASTER Tx BIT 0
OD = 1 OD = 1
OD = 0
*
*THE OD FLAG REMAINS AT 1 IF THE DEVICE WAS ALREADY AT OVERDRIVE SPEED BEFORE THE OVERDRIVE-MATCH ROM COMMAND WAS ISSUED.
*
*
CHAIN = ON?
Y
N
Y
CCh
SKIP ROM
COMMAND?
N
Y
3Ch
OVERDRIVE-
SKIP ROM?
N
Y
EN = LOW?
Y
Y
0Fh
CONDITIONAL
READ ROM?
Y
69h
OVERDRIVE-
MATCH ROM?
N
N
N
N
OD = 0
N
OD = 0
N
MASTER Tx BIT 1
MASTER Tx BIT 63
Y
Y
Y
BIT 0 MATCH?
MASTER Tx
RESET?
BIT 63 MATCH?
BIT 1 MATCH?
N
Y
MASTER Tx
RESET?
N
TO FIGURE 11a
FROM FIGURE 11a
FROM FIGURE 11a
TO FIGURE 11a
DS28EA00 Tx
FAMILY CODE
(1 BYTE)
DS28EA00 Tx
SERIAL NUMBER
(6 BYTES)
DS28EA00 Tx
CRC BYTE
Figure 11b. ROM Functions Flowchart