DS2422 Maxim, DS2422 Datasheet - Page 38

• Manufacturer Part Number: DS2422
• Description: The DS2422 temperature/data logger combines the core functions of a fully featured data logger in a single chip
• Manufacturer: Maxim

Figure 14-1. ROM Functions Flow Chart
Bus Master TX ROM
Function Command
Serial Number
Family Code
Command?
Read ROM
DS2422 TX
DS2422 TX
DS2422 TX
CRC Byte
(6 Bytes)
(1 Byte)
RC = 0
33h
From Memory Functions
Flow Chart (Figure 12)
Y
N
Master TX Bit 63
Master TX Bit 0
Master TX Bit 1
Match ROM
Command?
Match?
Match?
Match?
RC = 0
RC = 1
Bit 63
Bit 0
Bit 1
55h
Y
Y
Y
Y
Presence Pulse
Bus Master TX
Reset Pulse?
DS2422 TX
Reset Pulse
Y
N
N
N
Flow Chart (Figure 12)
To Memory Functions
N
OD
38 of 49
N
N
N
DS2422 TX Bit 63
DS2422 TX Bit 63
DS2422 TX Bit 0
DS2422 TX Bit 0
DS2422 TX Bit 1
DS2422 TX Bit 1
Master TX Bit 63
Master TX Bit 0
Master TX Bit 1
Search ROM
Command?
Match?
Match?
Match?
RC = 0
RC = 1
N
Bit 63
Bit 0
Bit 1
F0h
OD = 0
Y
Y
Y
Y
N
N
N
N
N
DS2422 TX Bit 63
DS2422 TX Bit 63
DS2422 TX Bit 0
DS2422 TX Bit 0
DS2422 TX Bit 1
DS2422 TX Bit 1
Master TX Bit 63
Condition Met?
Master TX Bit 0
Master TX Bit 1
Cond. Search
Command?
From Figure 14, 2
Match?
Match?
Match?
RC = 1
RC = 0
Bit 63
Bit 0
Bit 1
ECh
Y
From Figure 14
Y
Y
Y
Y
To Figure 14
To Figure 14
2
2
2
nd
nd
nd
Part
Part
Part
nd
N
Part