Datasheet

MAX31850/MAX31851
Cold-Junction Compensated, 1-Wire
Thermocouple-to-Digital Converters
17Maxim Integrated
Figure 7. ROM Commands Flowchart
F0h
SEARCH
ROM?
N
BIT 0
MATCH?
BIT 0
MATCH?
CCh
SKIP
ROM?
N
55h
MATCH
ROM?
N
NN
33h
READ
ROM?
N
Y
Y Y
Y
Y
MASTER Tx
BIT 0
DEVICE Tx
FAMILY CODE
1 BYTE
MASTER Tx
FUNCTION COMMAND
DEVICE Tx
SERIAL NUMBER
6 BYTES
DEVICE Tx
CRC BYTE
MASTER Tx
ROM COMMAND
DEVICE Tx
PRESENCE PULSE
MASTER Tx
RESET PULSE
INITIALIZATION
SEQUENCE
DEVICE Tx BIT 0
DEVICE Tx BIT 0
MASTER Tx BIT 0
MASTER Tx
BIT 63
DEVICE Tx BIT 63
DEVICE Tx BIT 63
MASTER Tx BIT 63
BIT 1
MATCH?
BIT 1
MATCH?
NN
BIT 63
MATCH?
BIT 63
MATCH?
NN
Y Y
Y Y
MASTER Tx
BIT 1
DEVICE Tx BIT 1
DEVICE Tx BIT 1
MASTER Tx BIT 1
Y