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14

Motherboard Information

Chapter 3

Embedded and Industrial Computing

IDE Signals•

Signal Signal Description

IDE_D[0:15] Bidirectional data to /

from IDE device.

IDE_A[0:2] Address lines to IDE

device.

IDE_LOW# I/O write line to IDE

device. Data latched on

trailing (rising) edge.

IDE_IOR# I/O read line to IDE

device.

IDE_REQ IDE Device DMA Request.

It is asserted by the IDE

device to request a data

transfer.

IDE_ACK# IDE Device DMA Ac-

knowledge.

IDE_CS1# IDE Device Chip Select

for 1F0h to 1FFh range.

IDE_CS3# IDE Device Chip Select

for 3F0h to 3FFh range.

IDE_IORDY IDE device I/O ready

input. Pulled low by the

IDE device to extend the

cycle.

IDE_RESET# Reset output to IDE de-

vice, active low.

IDE_IRQ Interrupt request from

IDE device.

IDE_CBLID# Input from o-Module

hardware indicating the

type of IDE cable being

used.

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