DS1922T-F5 MAXIM [Maxim Integrated Products], DS1922T-F5 Datasheet - Page 38

• Manufacturer Part Number: DS1922T-F5
• Description: Temperature Logger iButton With 8kB Datalog Memory
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 11-1. ROM Funtions Flow Chart
Bus Master TX ROM
Function Command
Serial Number
Family Code
Command?
DS1922 TX
DS1922 TX
DS1922 TX
Read ROM
CRC Byte
(6 Bytes)
(1 Byte)
RC = 0
33h
From Memory Functions
Flow Chart (Figure 9)
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?
DS1922 TX
Reset Pulse
Y
N
N
N
To Memory Functions
Flow Chart (Figure 9)
N
OD
38 of 50
N
N
N
DS1922 TX Bit 63
DS1922 TX Bit 63
DS1922 TX Bit 0
DS1922 TX Bit 0
DS1922 TX Bit 1
DS1922 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
DS1922 TX Bit 63
DS1922 TX Bit 63
DS1922 TX Bit 1
DS1922 TX Bit 1
DS1922 TX Bit 0
DS1922 TX Bit 0
Master TX Bit 63
Condition Met?
Master TX Bit 1
Master TX Bit 0
Cond. Search
Command?
From Figure 11, 2
Match?
Match?
Match?
RC = 1
RC = 0
Bit 63
Bit 0
Bit 1
ECh
Y
DS1922L/DS1922T
From Figure 11
Y
Y
Y
Y
To Figure 11
To Figure 11
2
2
2
nd
nd
nd
Part
Part
Part
nd
N
Part