2.e
S
ETTING
I
NTERFACE
P
ROTOCOL
FOR PROPER DATA INTERCHANGE BETWEEN A DAYTRONIC INSTRUMENT AND
A CONNECTED PC-HSICA TO OCCUR, THE PC-HSICA’S INTERFACE PORT AND
THE COMPUTER INTERFACE PORT OF THE DAYTRONIC INSTRUMENT MUST BE
SET TO THE SAME RS-232-C “PROTOCOL”—i.e., to the same BAUD RATE, NUM-
BER OF DATA BITS, NUMBER OF STOP BITS, AND PARITY.
PLEASE NOTE: When the PC-HSICA is set to “HSIC” mode,
if a baud rate of
1200 or lower is selected for the PC-HSICA interface—or if a baud rate of 3600,
7200, 56K, or 115.2K is selected—the actual baud rate will be 153.6K. The follow-
ing table summarizes the relation between selected and actual baud rate values.
Table 2 PC-HSICA Baud Rates
Selected
Actual
Selected
Actual
Baud Rate
Baud Rate
Baud Rate
Baud Rate
50
153.6K
3600
153.6K
75
153.6K
4800
4800
110
153.6K
7200
153.6K
134.5
153.6K
9600
9600
150
153.6K
19.2K
19.2K
300
153.6K
38.4K
38.4K
600
153.6K
56K
153.6K
1200
153.6K
115.2K
153.6K
2400
2400
153.6K
153.6K
When the PC-HSICA is set to “16C650” mode,
the baud rate is passed to the
UART as written.
2-5
S
ETUP OF
PC-HSICA C
OMMUNICATIONS
2
2.e S
ETTING
I
NTERFACE
P
ROTOCOL
1
2
3
4
5
8
1
2
3
5
7
20
Daytronic 9-Pin
Computer Interface Port
PC-HSICA
Interface Port
Shield
GND (Shield)
RECEIVE
XMIT
DTR
SGND
CTS
GND (Shield)
XMIT
RECEIVE
CTS
SGND
DTR/RTS
Fig. 3 Full-Handshake Cabling Between the PC-HSICA
Card and a Daytronic 9-Pin Computer Interface Port
