Filter
Top Products
Figure 6.7 Start command sequence
H
L
RXD
H
L
TXD
H
L
CTS
H
L
RTS
H
L
DTR
H
L
DSR
Sequence 1 t
1
Sequence 2 Sequence 3
S
T
B
S
T
B
0 1 0 0 0 0 0
P
B
0
S
P
B
S
T
B
1 1 0 0 1 0 1 0
P
B
S
P
B
S
T
B
1 1 1 1 1 1 1 1
P
B
S
P
B
0 1 0 0 0 0 0
P
B
S
P
B
S
T
B
0 1 1 1 0 0 1 0
P
B
S
P
B
S
T
B
0 0 0 0 0 1 1 1
P
B
S
P
B
S
T
B
1 1 0 0 0 0 0 0
P
B
S
P
B
0
t
2
H
L
RXD
H
L
TXD
H
L
CTS
H
L
RTS
H
L
DTR
H
L
DSR
Sequence 4
S
T
B
1 1 1 1 1 1 1 1
P
B
S
P
B
t
1
t
2
t
1
: Less than 500 ms
t
2
: More than 1 word length
Sequence 1: The host computer sends START command to the scanner.
X‘02’, ‘53’
Sequence 2: ACK for the START command is sent to the host computer.
X‘FF’
Sequence 3: Response for the START command is sent to the host computer.
X‘04’, ‘4E’, ‘E0’, ‘03’
Sequence 4: ACK for the response (issued at Sequence 3) is sent to the host computer.