參數(shù)資料
型號: DS1678
廠商: DALLAS SEMICONDUCTOR
元件分類: Timer or RTC
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDIP8
封裝: 0.300 INCH, DIP-8
文件頁數(shù): 13/24頁
文件大?。?/td> 301K
代理商: DS1678
DS1678
20 of 24
2-WIRE SERIAL COMMUNICATION WITH DS1678 Figure 4
A2
10
W
0
A
0W
1
S
1
0
A1 A0
00
A
P
SD A
SC L
D evice A ddress B yte
M em ory A ddress B yte
Start
D S 16 78
AC K
Stop
DS 1 67 8
AC K
W rite to M em o ry A d dress P o in ter
1
S
1
0
00
Rd
A
N
P
SD A
SCL
D evic e A ddress B yte
D ata B yte
Start
D S 16 78
ACK
Stop
Master
NA CK
R ead S ing le B yte fro m C u rren t M em ory A d d re ss P ointer L o catio n
D1
D2
D3
D4
D5
D6
D7
0
D0
1
S
1
0
D0
00
Rd
A
SD A
SCL
D evic e A ddress B yte
M os t S ignificant
D ata B yte
Start
D S 16 78
ACK
Master
AC K
R ead M u ltip le B ytes fro m C u rre nt M em o ry A d d ress P ointer L o catio n
D1
D2
D3
D4
D5
D6
D7
NP
Sto p
Mas ter
NAC K
Leas t S ignificant
D ata B yte
D1
D2
D3
D4
D5
D6
D7
0
D0
1
S
1
0
00
A
SD A
SCL
D evic e A ddress B yte
M em ory Ad dress Byte
Start
D S 16 78
ACK
D S 16 78
AC K
R ead S ing le B yte fro m N ew M em o ry A d d ress P o in ter L o cation
1
R
1
0
00
Rd
A
Devic e Add ress
Byte
R epeated
Start
D S 16 78
ACK
NP
D ata B yte
S to p
Mas ter
NAC K
D1
D2
D3
D4
D5
D6
D0
SD A
SC L
D7
SD A
SC L
W rite to M em o ry Lo catio n (S in gle B yte)
AP
Stop
D S 1678
ACK
D0
D ata B yte
D1
D2
D3
D4
D5
D6
D7
A3
A4
A5
A6
A7
0W
1
S
1
0
A1 A0
00
A
D evic e A ddress B yte
M em ory A ddres s B yte
Start
D S 16 78
ACK
D S 1678
AC K
A2
A3
A4
A5
A6
A7
1
A1 A0
A2
A3
A4
A5
A6
A7
2-WIRE COMMUNICATION TIMING DIAGRAM Figure 5
SU:STO
t
t SP
HD:STA
t
t SU:STA
SU:DAT
t
tHIGH
R
t
tLOW
tHD:STA
SCL
START
SDA
STOP
tBUF
tF
REPEATED
START
tHD:DAT
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