Rainbow Electronics DS28EA00 - Manual (Page 22)

DS28EA00 1-Wire Digital Thermometer with Sequence Detect and PIO
22 of 29
Figure 12-2. ROM Functions Flow Chart
Y
N
Y
N
N
N
OD = 1
Master TX Bit 0
Master TX Bit 63
Master TX Bit 1
Bit 0
Match?
Bit 1
Match?
Bit 63
Match?
Y
Y
69h
OD Match
ROM?
OD = 1
Master
TX Reset ?
Y
N
Y
N 3Ch
OD Skip
ROM?
From Figure 12
1
st
Part
From Figure 12
1
st
Part
To Figure 12, 1
st
Part
Y
N CCh
Skip ROM
Cmnd.?
To Figure 12
1
st
Part
Y
N 0Fh
Cond. Read
ROM?
Chain = ON?
Y
N
EN\ = LOW?
Y
N
DS28EA00 TX
CRC Byte
DS28EA00 TX
Serial Number
(6 Bytes)
DS28EA00 TX
Family Code
(1 Byte)
Master
TX Reset?
N
Y
OD = 0
OD = 0
OD = 0
1)
1) The OD flag remains at 1 if the device was already at Overdrive
speed before the Overdrive Match ROM command was issued.
1)
1)