DS1904 データシートの表示（PDF） - Maxim Integrated
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DS1904 Datasheet PDF : 13 Pages
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ROM FUNCTIONS FLOW CHART Figure 7
Master TX
Reset Pulse
DS1904 TX
Presence Pulse
Master TX ROM
Function Command
33H
Read ROM
N
Command
?
Y
55H
Match ROM
N
Command
?
Y
F0H
Search ROM
Command
?
Y
N
CCH
Skip ROM
N
Command
?
Y
DS1904
DS1904 TX
Family Code
1 Byte
Master TX Bit 0
DS1904 TX Bit 0
DS1904 TX Bit 0
Master TX Bit 0
DS1904 TX
Serial Number
6 Bytes
Bit 0
N
Match ?
Y
Master TX Bit 1
N
Bit 0
Match ?
Y
DS1904 TX Bit 1
DS1904 TX Bit 1
Master TX Bit 1
Bit 1
NN
Match ?
Y
Bit 1
Match ?
Y
DS1904 TX
CRC Byte
Master TX Bit 63
DS1904 TX Bit 63
DS1904 TX Bit 63
Master TX Bit 63
Bit 63
NN
Match ?
Y
Bit 63
Match ?
Y
Master TX Control
Function Command
(SEE FIGURE 5)
8 of 13
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