DS1820
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MEMORY FUNCTIONS FLOW CHART Figure 10
4Eh
WRITE
SCRATCHPAD
?
MASTER T
X
MEMORY
OR CONTROL COMMAND
DS1820 SETS ADDRESS
COUNTER TO 2
MASTER T
X
DATA BYTE
TO SCRATCHPAD
MASTER
T
X
RESET
?
ADDRESS
=3
?
DS1820 INCREMENTS
ADDRESS
MASTER
T
X
RESET
?
BEh
READ
SCRATCHPAD
?
DS1820 SETS ADDRESS
COUNTER TO 0
MASTER R
X
DATA
FROM SCRATCHPAD
MASTER
T
X
RESET
?
ADDRESS
=7
?
DS1820 INCREMENTS
ADDRESS
MASTER R
X
8–BIT
CRC OF DATA
DS1820 T
X
PRESENCE PULSE
MASTER
T
X
RESET
?
MASTER R
X
“1s”
N
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
Y
Y
