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User’s Manual
ESM-2850 User’s Manual
37
2.4.3.1 Signal Description – ETX Express Connector 2 (CN1B)
2.4.3.1.1 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_REQ#
IDE Device DMA Request. It is asserted by the IDE device to request a data
transfer.
IDE_IOW# I/O write line to IDE device. Data latched on trailing (rising) edge.
IDE_ACK# IDE Device DMA Acknowledge.
IDE_IRQ Interrupt request from IDE device.
IDE_IORDY IDE device I/O ready input. Pulled low by the IDE device to extend the cycle.
IDE_IOR# I/O read line to IDE device.
IDE_CS1# IDE Device Chip Select for 1F0h to 1FFh range.
IDE_CS3# IDE Device Chip Select for 3F0h to 3FFhrange.
IDE_RESET# Reset output to IDE device, active low.