Register Description - SeaLevel PLC-16.PCI User Manual

Register Description

All ports are set to input after reset or power up.
Address Mode
Base+0
Base+1
Base+2
Base+3
Base+4
Base+5
Base+6
Base+7
Interrupt Control
When enabled, interrupts are generated on Port A bit D0.
IRQEN
IRC0
IRC1
Interrupt Mode Select Table
Interrupt source is Base+0 bit D0. When selecting the Interrupt Type, always disable
interrupts prior to changing or setting states. This will help prevent inadvertent or
unexpected interrupts from occurring.
Warning: When using the High and Low Level interrupts, an interrupt occurs when
input D0 changes to either a High or Low state. This will cause the computer to
remain in an interrupt state until the input state changes.
© Sealevel Systems, Inc.
D7 D6
RD/WR PAD7 PAD6
RD {0} {0}
RD/WR PCD7 PCD6
RD {0} {0}
RD {0} {0}
RD/WR IRQEN IRQST {0}
RD {0} {0}
RD {0} {0}
Interrupt enable
IRC1 IRC0 Interrupt Type
0 0
0 1 High Level
1 0 Falling Edge
1 1 Rising Edge
D5 D4 D3
PAD5 PAD4 PAD3 PAD2 PAD1 PAD0
{0} {0} {0}
PCD5 PCD4 PCD3 PCD2 PCD1 PCD0
{0} {0} {0}
{0} {0} {0}
{0} {0}
{0} {0} {0}
{0} {0} {0}
1 = enabled
Interrupt mode select, see table below
Interrupt mode select, see table below
Low Level
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D2 D1 D0
{0} {0} {0}
{0} {0} {0}
{0} {0} {0}
{0} IRC1 IRC0
{0} {0} {0}
{0} {0} {0}
0 = disabled ( 0 on power up )
PLC-16.PCI User Manual