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COM-2GY Datasheet(PDF) 4 Page - Contec Co., Ltd

Part No. COM-2GY
Description  F&eIT Series RS-232C 2ch Communication Module
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Maker  CONTEC [Contec Co., Ltd]
Homepage  https://www.contec.com/
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COM-2GY Datasheet(HTML) 4 Page - Contec Co., Ltd

   
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Ver.1.02
COM-2(FIT)GY
4
The output baud rate can be set by setting the appropriate
value to the Baud Rate Generator resister.
The available
setting range depends on which clock mode is used.
Clock 3 mode: 15 - 921,600bps
Clock 2 mode: 8 - 460,800bps
Clock 1 mode: 4 - 230,400bps
Clock 0 mode: 2 - 115,200bps
However, some baud rate values do not have a corresponding
Baud Rate Generator resister setting.
If the result of
substituting the baud rate into the equation below is an integer,
then that baud rate can be set.
If the result contains a
fractional part, the baud rate cannot be set.
Clock 3 mode
921600 ÷ Desired baud rate
= Division resister setting value
Ex.) 921600 ÷ 9600bps
= 96 (As the result is an integer, this
baud rate can be set.)
921600 ÷ 128000bps
= 7.2 (As the result contains a
fractional part, this baud rate cannot be set.)
Clock 2 mode
460800 ÷ Desired baud rate
= Division resister setting value
Ex.) 460800 ÷ 9600bps
= 48 (As the result is an integer, this
baud rate can be set.)
460800 ÷ 128000bps
= 3.6 (As the result contains a
fractional part, this baud rate cannot be set.)
Clock 1 mode
230400 ÷ Desired baud rate
= Division resister setting value
Ex.) 230400 ÷ 9600bps
= 24 (As the result is an integer, this
baud rate can be set.)
230400 ÷ 128000bps
= 1.8 (As the result contains a
fractional part, this baud rate cannot be set.)
Clock 0 mode
115200 ÷ Desired baud rate
= Division resister setting value
Ex.) 115200 ÷ 9600bps
= 12 (As the result is an integer, this
baud rate can be set.)
115200 ÷ 76800bps
= 1.5 (As the result contains a
fractional part, this baud rate cannot be set.)
CAUTION
See the manual Chapter 5 “Interrupt Vector Resisters” for
selecting the clock frequency (1.8432, 3.6864, 7.3728, or
14.7456 MHz).
For use in compatible mode, clock 0 (1.8432 MHz) is used as
a fixed setting.
Refer to the following baud rate setting examples.
Baud rates
other than those listed below can also be set if they produce a
valid setting value in the equation described above.
Baud Rate Generator Programming Table
Clock 0 mode
(1.8432MHz)
Clock 1 mode
(3.6864MHz)
Clock 2 mode
(7.3728MHz)
Clock 3 mode
(14.7456MHz)
Output
baud rate
Baud Rate
Generator
resister
Setup
error
(%)
Baud Rate
Generator
resister
Setup
error
(%)
Baud Rate
Generator
resister
Setup
error
(%)
Baud Rate
Generator
resister
Setup
error
(%)
2
57600
-
4
28800
-
57600
-
5
23040
-
46080
-
8
14400
-
28800
-
57600
-
15
7680
-
15360
-
30720
-
61440
-
50
2304
-
4608
-
9216
-
18432
-
75
1536
-
3072
-
6144
-
12288
-
110
1047
0.026
2094
0.026
4189
0.0022
8378
0.0022
134.5
857
0.058
1713
0.0006
3426
0.0006
6852
0.0006
150
768
-
1536
-
3072
-
6144
-
300
384
-
768
-
1536
-
3072
-
600
192
-
384
-
768
-
1536
-
1200
96
-
192
-
384
-
768
-
1800
64
-
128
-
256
-
512
-
2000
58
0.68
115
0.17
230
0.17
461
0.04
2400
48
-
96
-
192
-
384
-
3600
32
-
64
-
128
-
256
-
4800
24
-
48
-
96
-
192
-
7200
16
-
32
-
64
-
128
-
9600
12
-
24
-
48
-
96
-
14400
8
-
16
-
32
-
64
-
19200
6
-
12
-
24
-
48
-
28800
4
-
8
-
16
-
32
-
38400
3
-
6
-
12
-
24
-
57600
2
-
4
-
8
-
16
-
76800
3
-
6
-
12
-
115200
1
-
2
-
4
-
8
-
153600
3
-
6
-
230400
1
-
2
-
4
-
460800
1
-
2
-
921600
1
-
TxD, RTS, DTR
RxD, CTS, DSR, DCD, RI
MAX3245
Stack Connector
Control Circuit
UART
XR16C2850
Compatible
Driver
Receiver
Driver
Receiver
Device ID
Interface Connector CH0
Interface Connector CH1
Setting the Baud Rate
Equivalence Circuit
Block Diagram


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