DS2408 Maxim, DS2408 Datasheet - Page 22

• Manufacturer Part Number: DS2408
• Description: The DS2408 is an 8-channel, programmable I/O 1-Wire® chip
• Manufacturer: Maxim

Figure 12-1. ROM FUNCTIONS FLOW CHART
Bus Master TX ROM
Function Command
Serial Number
Family Code
Command?
Read ROM
DS2408 TX
DS2408 TX
DS2408 TX
CRC Byte
(6 Bytes)
(1 Byte)
RC = 0
33h
From Control Functions
Flow Chart (Figure 8)
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?
DS2408 TX
Reset Pulse
Y
N
N
N
N
Flow Chart (Figure 8)
To Control Functions
OD
22 of 39
N
N
N
DS2408 TX Bit 63
DS2408 TX Bit 63
DS2408 TX Bit 0
DS2408 TX Bit 0
DS2408 TX Bit 1
DS2408 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
DS2408 TX Bit 63
DS2408 TX Bit 63
DS2408 TX Bit 1
DS2408 TX Bit 1
DS2408 TX Bit 0
DS2408 TX Bit 0
Master TX Bit 63
Condition Met?
Master TX Bit 1
Master TX Bit 0
Cond. Search
Command?
From Figure 12, 2
Match?
Match?
Match?
RC = 1
RC = 0
Bit 63
Bit 0
Bit 1
ECh
Y
From Figure 12
Y
Y
Y
Y
To Figure 12
To Figure 12
2
2
2
nd
nd
nd
Part
Part
Part
nd
N
DS2408
Part