Rainbow-electronics DS2422 Manuale Utente Pagina 38

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DS2422
38 of 48
Figure 14-1. ROM Functions Flow Chart
From Figure 14
2
nd
Part
To Memory Functions
Flow Chart (Figure 12)
Master TX Bit 0
Master TX Bit 63
Master TX Bit 1
RC = 1
DS2422 TX
CRC Byte
DS2422 TX
Serial Number
(6 Bytes)
DS2422 TX
Family Code
(1 Byte)
Bit 0
Match?
Y
N
Bit 1
Match?
Y
N
Bit 63
Match?
Y
N
DS2422 TX Bit 0
DS2422 TX Bit 0
Master TX Bit 0
DS2422 TX Bit 1
DS2422 TX Bit 1
Master TX Bit 1
DS2422 TX Bit 63
DS2422 TX Bit 63
Master TX Bit 63
RC = 1
Bit 0
Match?
Y
N
Bit 1
Match?
Y
N
Bit 63
Match?
Y
N
To Figure 14
2
nd
Part
RC = 0RC = 0 RC = 0RC = 0
YY Y
Y
N
F0h
Search ROM
Command?
N
55h
Match ROM
Command?
N
ECh
Cond. Search
Command?
N
33h
Read ROM
Command?
To Figure 14
2
nd
Part
From Memory Functions
Flow Chart (Figure 12)
Bus Master TX ROM
Function Command
DS2422 TX
Presence Pulse
OD
Reset Pulse?
N
Y
OD = 0
Bus Master TX
Reset Pulse
From Figure 14, 2
n
d
Part
Condition Met?
Y
N
DS2422 TX Bit 0
DS2422 TX Bit 0
Master TX Bit 0
DS2422 TX Bit 1
DS2422 TX Bit 1
Master TX Bit 1
DS2422 TX Bit 63
DS2422 TX Bit 63
Master TX Bit 63
RC = 1
Bit 0
Match?
Y
N
Bit 1
Match?
Y
N
Bit 63
Match?
Y
N
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