DS18B20-PAR_07 MAXIM [Maxim Integrated Products], DS18B20-PAR_07 Datasheet - Page 11

• Manufacturer Part Number: DS18B20-PAR_07
• Description: 1-Wire Parasite-Power Digital Thermometer
• Manufacturer: MAXIM [Maxim Integrated Products]

ROM COMMANDS FLOW CHART Figure 10
DS18B20-PAR T
SERIAL NUMBER
DS18B20-PAR T
DS18B20-PAR T
FAMILY CODE
READ ROM
COMMAND
CRC BYTE
6 BYTES
1 BYTE
33h
Y
X
X
X
Initialization
Sequence
N
MATCH ROM
MASTER T
MASTER T
MASTER T
COMMAND
MATCH?
MATCH?
MATCH?
BIT 63
BIT 0
BIT 63
BIT 0
BIT 1
BIT 1
55h
Y
Y
Y
Y
MASTER T
T
X
DS18B20-PAR
X
RESET PULSE
X
X
MASTER T
COMMAND
PRESENCE
N
PULSE
N
N
N
X
ROM
X
(FIGURE 11)
MASTER T
COMMAND
FUNCTION
N
DS18B20-PAR T
DS18B20-PAR T
DS18B20-PAR T
DS18B20-PAR T
DS18B20-PAR T
DS18B20-PAR T
N
N
MASTER T
MASTER T
MASTER T
SEARCH ROM
11 of 19
COMMAND
MATCH?
MATCH?
Y
Y
MATCH?
BIT 63
BIT 0
BIT 1
X
F0h
X
X
X
Y
BIT 63
Y
BIT 0
BIT 1
X
X
X
X
X
X
BIT 63
BIT 63
BIT 0
BIT 1
BIT 0
BIT 1
N
DS18B20-PAR T
DS18B20-PAR T
MASTER T
ALARM SEARCH
WITH ALARM
COMMAND
FLAG SET?
DEVICE(S)
ECh
X
Y
Y
BIT 0
X
X
BIT 0
BIT 0
N
N
COMMAND
SKIP ROM
CCh
Y
DS18B20-PAR
N