PCM-3643 Startup Manual
7
JP2 controls
COM1,COM2,COM3,COM4
JP4-inactive
JP6-inactive
JP8-inactive
JP3 controls
COM5,COM6,COM7,COM8
JP5-inactive
JP7-inactive
JP9-inactive
The
EMAC
PCM-3643 PC/104 Serial Port Module is
flexible in that it can use multiple configurations of
jumpers JP2 to JP9 to control IRQ sharing. Here are
the choices:
JP2 controls
COM1
JP4 controls
COM2
JP6 controls
COM3
JP8 controls
COM4
JP3 controls
COM5
JP5 controls
COM6
JP7 controls
COM7
JP9 controls
COM8
2. Can use 2 COM ports shared on 1 IRQ
JP2 controls
COM1 and COM2
JP4-inactive
JP6
COM3 and COM4
JP8-inactive
JP3
COM5 and COM6
JP5-inactive
JP7
COM7 and COM8
JP9-inactive
(3) JP2 ~ JP9: IRQ Select
JP2,4,6,8; JP3,5,7,9------IRQ Select
Bit1 - IRQ3
Bit2 - IRQ4
Bit3 - IRQ5
Bit4 - IRQ7
Bit5 - IRQ9
Bit6 - IRQ10
Bit7 - IRQ11
Bit8 - IRQ12
Note: The right jumper is Bit8 and the left is Bit1.
Note: Share mode recommended 4 COM Share 1 IRQ.
4. Can use 8 COM ports shared on 1 IRQ
JP2 controls
COM1,COM2,COM3,COM4,COM5,COM6,COM7,COM8
JP4-inactive
JP6-inactive
JP8-inactive
JP3-inactive
JP5-inactive
JP7-inactive
JP9-inactive
Example: Lets use the default for example. 4 COM
ports (COM1, COM2, COM3, COM4) are controlled by
JP2 (jumped), so, JP4, JP6, JP8 are ignored.
So, in our example above, since IRQ3 is being used
by COM1, COM2, COM3, COM4 (default setting), you
can't use IRQ3 again by jumping JP3 to use COM5,
COM6, COM7, COM8. You have to use a different
IRQ.
Note: You can't use the same IRQ at the same time.
Default setting: 4 COM ports share 1 1 IRQ, JP2 set
to IRQ5, JP3 set to IRQ10
3
4
5
7
9
10
11
12
IRQ
JP2
IRQ
3
4
5
7
9
10
11
12
3
4
5
7
9
10
11
12
IRQ
JP3
1. Can use 1 COM port with 1 IRQ, so
3. Can use 4 COM ports shared on 1 IRQ
(Default setting)
