7
PCM-3618 User Manual
Chapter 2
Jumper
and
Switch
Settings
Shared IRQ Selection (JP3)
Select an IRQ which is not in use by another card in the system. If you are installing
more than one PCM-3618, set them to different IRQ numbers. Jumper Bank JP3
controls the card IRQ. Simply place jumper on desired pin head.
Independent IRQ Mode
Interrupt Status Register Setup (SW1, Vector Address)
This feature on the PCM-3618 is utilized in the shared IRQ. When data arrives at one
of the eight ports, an interrupt will be generated in the interrupt register. The PC soft-
ware can read this, and identify immediately which port generated the interrupt. This
saves time and makes programming easier. When a data bit of the interrupt status
register is set to 0, the corresponding channel is selected to generate an interrupt. If
the bit is 1, then no interrupt is generated. DIP switch SW1controls the card's inter-
rupt status register, as shown in the following table.
Port Base address (SW2)
Base Address
A3
A4
A5
A6
A7
A8
A9
200-207
X
X
X
X
X
X
O
208-20F
O
X
X
X
X
X
O
*300-307
X
X
X
X
X
O
O
3E8-3EF
O
X
O
O
O
O
O
3F8-3FF
O
O
O
O
O
O
O
X:ON O:OFF *:Default
Note!
If your CPU module or card has serial interface ports, you will need to
adjust the I/O port addresses (or disable the ports) to avoid conflicts.
SW3
SW4
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
ON
ON
ON
ON
ON
ON
ON
ON
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
ON: always high or low status for RS-422 mode( RS-422 Master)
OFF( Auto): automatically sense direction of data flow for RS-485( RS-422 Slave)
Summary of Contents for PCM-3618
Page 1: ...User Manual PCM 3618 8 port RS 422 485 High Speed Module...
Page 6: ...PCM 3618 User Manual vi...
Page 8: ...PCM 3618 User Manual viii...
Page 9: ...Chapter 1 1 Overview...
Page 13: ...Chapter 2 2 Jumper and Switch Settings...
Page 19: ...Chapter 3 3 Software Drivers...
Page 25: ...Chapter 4 4 Hardware Installation...
Page 27: ...19 PCM 3618 User Manual Chapter 4 Hardware Installation...
