
31
Serial Interface Control
PROGRAM
Protocol, Baud Rate,
Data Frame & Time Out Setting
M_DEFAULT
Family Code Selection
P.C
Parameter Selection
Option Code
Handshaking Protocol
SS
SS
SS
SS
None (free running mode)
RTS/CTS (hardware handshaking)
ACK/NAK (software handshaking)
Xon/Xoff (software handshaking)
0
1
2
3
Baud Rate (BPS)
SS
SS
SS
SS
38.4K BPS
19.2K BPS
9600 BPS
4800 BPS
2400 BPS
1200 BPS
600 BPS
300 BPS
0
1
2
3
4
5
6
7
Data Frame
SS
SS
SS
SS
SS
SS
SS
SS
8, None, 1
8, Odd, 1
8, Even, 1
8, Space, 1
8, Mark, 1
8, None, 2
7, Odd, 1
7, Even, 1
7, Space, 1
7, Mark, 1
7, None, 2
7, Odd, 2
7, Even, 2
7, Space, 2
7, Mark, 2
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
Time Out Control
SS
SS
SS
MS
None
200 mseconds
500 mseconds
1 second
2 seconds
5 seconds
User defined value
(seconds)
0
1
2
3
4
5
6,
(2 digits)
When the
RTS/CTS Hardware Handshaking
option is selected, the
RTS
(request to send) and
CTS
(clear to send)
signals will be issued before normal data communication. This option is very helpful to ensure the reliability of data
communication.
When the
ACK/NAK Software Handshaking
option is selected, the C70 waits for an
ACK
(acknowledge) or
NAK
(not
acknowledge) from the host computer after each data transmission. If the NAK is received, C70 will re-send the data
until receiving ACK.
The
Time Out Control
is a pre-defined delay time for C70 to wait for handshaking, acknowledgment or non-
acknowledgment from the host computer.