參數(shù)資料
型號: DS1904
英文描述: RTC iButton
文件頁數(shù): 8/12頁
文件大小: 72K
代理商: DS1904
DS1904
8 of 12
ROM FUNCTIONS FLOW CHART
Figure 7
F0H
Search ROM
Command
DS1904 TX Bit 0
DS1904 TX Bit 0
Master TX Bit 0
Bit 0
Match
DS1904 TX Bit 1
DS1904 TX Bit 1
Master TX Bit 1
Bit 1
Match
DS1904 TX Bit 63
DS1904 TX Bit 63
Master TX Bit 63
Bit 63
Match
Master TX Control
Function Command
33H
Read ROM
Command
DS1904 TX
Serial Number
6 Bytes
DS1904 TX
CRC Byte
DS1904 TX
Family Code
1 Byte
Ma55H
Command
Bit 0
Match
Bit 1
Match
Bit 63
Match
Master TX Bit 1
Master TX Bit 0
N
Y
N
Y
N
N
Y
N
N
N
N
Y
Y
Y
Y
Y
Y
(SEE FIGURE 5)
Master TX ROM
Function Command
Master TX
Reset Pulse
DS1904 TX
Presence Pulse
CCH
Skip ROM
Command
N
Y
N
Master TX Bit 63
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