Rainbow Electronics DS1957 - Manual (Page 18)

DS1957
18 of 25
ROM FUNCTIONS FLOW CHART Figure 6
N
Y
Y
Y
DS1954 TX
PRESENC
PULSE
33H
READ
COMMAN
?
55H
MATCH
COMMAN
?
F0H
SEARCH
COMMAN
?
CCH
SKIP
COMMAN
?
DS1954 TXFAMILY
CODE
1 BYTE
BIT 0
MATCH
BIT 0
MATCH
BIT 1
MATCH
?
BIT 1
MATCH
?
BIT 63
MATCH
?
BIT 63
MATCH
?
DS1954 TX
SERIAL
6 BYTES
DS1954 TX
CRC
N N N
Y Y Y
N N
Y
N N
Y
Y Y
DS1954 TX BIT 0
DS1954 TX BIT 0
DS1954 TX BIT 1
DS1954 TX BIT 1
DS1954 TX BIT 63
DS1954 TX 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