DS28EA00 Datasheet, PDF (21/29 Pages) Dallas Semiconductor – 1-Wire Digital Thermometer with Sequence Detect and PIO

DS28EA00 1-Wire Digital Thermometer with Sequence Detect and PIO
Figure 12-1. ROM Funtions Flow Chart
From Control Functions
Flow Chart (Figure 10)
Bus Master TX
Reset Pulse
OD
N
Reset Pulse?
OD = 0
From Figure 12, 2^nd Part
Bus Master TX ROM
Function Command
33h
N
Read ROM
Command?
Y
Y
DS28EA00 TX
Presence Pulse
55h
N
Match ROM
Command?
Y
F0h
N
Search ROM
Command?
Y
To Figure 12
2^nd Part
ECh
Cond. Search
Command?
N
Y
DS28EA00 TX
Family Code
(1 Byte)
DS28EA00 TX
Serial Number
(6 Bytes)
DS28EA00 TX
CRC Byte
Master TX Bit 0
DS28EA00 TX Bit 0
DS28EA00 TX Bit 0
Master TX Bit 0
Bit 0
N
Match?
Y
Master TX Bit 1
N
Bit 0
Match?
Y
DS28EA00 TX Bit 1
DS28EA00 TX Bit 1
Master TX Bit 1
Bit 1
Match?
NN
Y
Bit 1
Match?
Y
Master TX Bit 63
DS28EA00 TX Bit 63
DS28EA00 TX Bit 63
Master TX Bit 63
Bit 63
Match?
NN
Y
Bit 63
Match?
Y
N
Temp. Alarm?
Y
DS28EA00 TX Bit 0
DS28EA00 TX Bit 0
Master TX Bit 0
N
Bit 0
Match?
Y
DS28EA00 TX Bit 1
DS28EA00 TX Bit 1
Master TX Bit 1
N
Bit 1
Match?
Y
DS28EA00 TX Bit 63
DS28EA00 TX Bit 63
Master TX Bit 63
N
Bit 63
Match?
Y
To Figure 12
2^nd Part
To Control Functions Flow
Chart (Figure 10)
From Figure 12
2^nd Part
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