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Компоненты Описание
DS2407V Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated
Номер в каталоге
Компоненты Описание
производитель
DS2407V
Dual Addressable Switch Plus 1K–Bit Memory
Dallas Semiconductor -> Maxim Integrated
DS2407V Datasheet PDF : 31 Pages
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DS2407
MEMORY FUNCTION FLOW CHART
Figure 6
MASTER T
X
MEMORY
FUNCTION COMMAND
F0h
READ
N
MEMORY
?
Y
BUS MASTER T
X
TA1 (T7:T0)
BUS MASTER T
X
TA2 (T15:T8)
DS2407 SETS MEMORY
ADDRESS = (T15:T0)
BUS MASTER R
X
DATA FROM
DATA MEMORY
Y
BUS MASTER
T
X
RESET
?
DS2407 INCREMENTS
N
ADDRESS COUNTER
N
END
OF DATA
MEMORY
?
Y
Y
BUS MASTER
T
X
RESET
?
N
BUS MASTER R
X
CRC16 OF COMMAND,
ADDRESS, DATA
LEGEND:
Y
BUS MASTER
T
X
RESET
?
N
BUS MASTER
R
X
1’S
A5h
EXTENDED
N
READ MEMORY
?
Y
BUS MASTER T
X
TA1 (T7:T0)
BUS MASTER T
X
TA2 (T15:T8)
TO FIGURE 6
SECOND PART
DS2407 SETS MEMORY
ADDRESS = (T15:T0)
BUS MASTER R
X
REDIR. BYTE
BUS MASTER R
X
CRC16 OF COMMAND,
ADDRESS, REDIR. BYTE
(1ST PASS)
CRC16 OF REDIR. BYTE (SUBSEQUENT
PASSES)
BUS MASTER
T
X
RESET
N
CRC
CORRECT
?
Y
BUS MASTER R
X
DATA FROM
DATA MEMORY
Y
BUS MASTER
T
X
RESET
?
N
DS2407 INCREMENTS
ADDRESS COUNTER
END OF
N
PAGE
?
Y
BUS MASTER R
X
CRC16
OF PRECEDING PAGE OF DATA
BUS MASTER
T
X
RESET
N
CRC
CORRECT
?
Y
END OF
DATA
MEMORY
?
Y
Y
DS2407 INCREMENTS
ADDRESS COUNTER
N
DECISION MADE
BY THE MASTER
DECISION MADE
BY DS2407
DS2407 T
X
PRESENCE PULSE
Y
BUS MASTER
T
X
RESET
?
N
BUS MASTER
R
X
1’S
012099 11/31
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