Owner's manual

DS1957
18 of 25
ROM FUNCTIONS FLOW CHART Figure 6
N
Y
Y
Y
DS1954 T
X
PRESENC
PULSE
33H
READ
COMMAN
?
55H
MATCH
COMMAN
?
F0H
SEARCH
COMMAN
?
CCH
SKIP
COMMAN
?
DS1954 T
X
FAMILY
CODE
1 BYTE
BIT 0
MATCH
BIT 0
MATCH
BIT 1
MATCH
?
BIT 1
MATCH
?
BIT 63
MATCH
?
BIT 63
MATCH
?
DS1954 T
X
SERIAL
6 BYTES
DS1954 T
X
CRC
N
NN
Y
Y
Y
NN
Y
N
N
Y
Y
Y
DS1954 TX BIT 0
DS1954 T
X
BIT 0
DS1954 TX BIT 1
DS1954 T
X
BIT 1
DS1954 TX BIT 63
DS1954 T
X
BIT 63
MASTER TX BIT 1
MASTER TX BIT 0
MASTER TX BIT 0
MASTER TX BIT 1
MASTER TX BIT 63
MASTER TX BIT 63
MASTER
RESET
MASTER TX
FUNCTION
N
N
SHORT
RESET
PULSE
?
OD=0
N
Y
1) TO BE TRANSMITTED OR RECEIVED AT
SPEED IF
2) THE PRESENCE PULSE WILL BE SHORT IF
1
)
1)
1)
1
)
1)
1)
1
)
1)
1)
1
)
1)
1)
1)
1
)
1
)
2)
FROM FIGURE 6 SECOND PART
TO FIGURE 6
SECOND PART
TO FIGURE 6
SECOND PART
FROM FIGURE 6
SECOND PART
1
)
FROM DATA TRANSFER
CONTROL FUNCTION FLOW
(FIGURE 4)
TO DATA TRANSFER AND
FUNCTION FLOW CHART (FIGURE