Figure 12-1. rom funtions flow chart – Rainbow Electronics DS28EA00 User Manual
Page 21
DS28EA00 1-Wire Digital Thermometer with Sequence Detect and PIO
21 of 29
Figure 12-1. ROM Funtions Flow Chart
From Figure 12
2
nd
Part
To Control Functions Flow
Chart (Figure 10)
Master TX Bit 0
Master TX Bit 63
Master TX Bit 1
DS28EA00 TX
CRC Byte
DS28EA00 TX
Serial Number
(6 Bytes)
DS28EA00 TX
Family Code
(1 Byte)
Bit 0
Match?
Y
N
Bit 1
Match?
Y
N
Bit 63
Match?
Y
N
DS28EA00 TX Bit 0
DS28EA00 TX Bit 0
Master TX Bit 0
DS28EA00 TX Bit 1
DS28EA00 TX Bit 1
Master TX Bit 1
DS28EA00 TX Bit 63
DS28EA00 TX Bit 63
Master TX Bit 63
Bit 0
Match?
Y
N
Bit 1
Match?
Y
N
Bit 63
Match?
Y
N
To Figure 12
2
nd
Part
Y
Y
Y
Y
N
F0h
Search ROM
Command?
N
55h
Match ROM
Command?
N
ECh
Cond. Search
Command?
N
33h
Read ROM
Command?
To Figure 12
2
nd
Part
From Control Functions
Flow Chart (Figure 10)
Bus Master TX ROM
Function Command
DS28EA00 TX
Presence Pulse
OD
Reset Pulse?
N
Y
OD = 0
Bus Master TX
Reset Pulse
From Figure 12, 2
nd
Part
Temp. Alarm?
Y
N
DS28EA00 TX Bit 0
DS28EA00 TX Bit 0
Master TX Bit 0
DS28EA00 TX Bit 1
DS28EA00 TX Bit 1
Master TX Bit 1
DS28EA00 TX Bit 63
DS28EA00 TX Bit 63
Master TX Bit 63
Bit 0
Match?
Y
N
Bit 1
Match?
Y
N
Bit 63
Match?
Y
N