Manual

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DIO-16.LPCI User Manual

All ports are set to input after reset or power up.

Address Mode D7 D6 D5 D4 D3 D2 D1 D0

Base+0

Input Port A RD PAD7 PAD6 PAD5 PAD4 PAD3 PAD2 PAD1 PAD0

Base+2

Output Port C RD/WR PCD7 PCD6 PCD5 PCD4 PCD3 PCD2 PCD1 PCD0

Base+5

Interrupt Status RD/WR IRQEN IRQST 0 0 0 0 IRC1 IRC0

Interrupt Control

When enabled, interrupts are generated on Port A bit D0.

IRQEN

Interrupt enable 1 = enabled 0 = disabled ( 0 on power up )

IRC0

IRC1

Interrupt mode select, see table below

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.

IRC1 IRC0 Interrupt Type

0 0 Low Level

0 1 High Level

1 0 Falling Edge

1 1 Rising Edge

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.

Interrupt Read

Reading the Interrupt Status port (Base+5) clears any interrupt pending.

IRQST (D0) Interrupt Status 1 = interrupt pending, 0 = none