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RI7SM User’s Manual
15
JP9: DiskOnChip BIOS Expansion Address Select
JP9
Setting
Function
1
3
Pin 2-3
D8000-DFFFF(default)
1
3
Pin 1-2
D0000-D7FFF
JP10: RS232/422/485 Selection
COM1/COM3/ COM4 are fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the jumper settings of this connector.
COM2
Function
RS-232
RS-422
RS-485
Jumper
Setting
(pin closed)
all
jumpers
open
1-2
3-4
5-6
7-8
11-12
15-16
17-18
19-20
23-24
1-2
3-4
5-6
7-8
9-10
11-12
13-14
15-16
17-18
19-20
21-22
Jumper
Illustration
Содержание Mungo540
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