Motorola MCPN750A, IH5 EIDE Interface, USB Interface, ISA Interrupt Controller, ISA DMA Channels

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Functional Description

EIDE Interface

The PBC EIDE interface is capable of accelerated PIO transfers as well as acting as a PCI bus master on behalf of an IDE DMA slave device. The EIDE interface provides a primary and secondary IDE interface, for up to four IDE devices and supports ATAPI-compliant devices.

The Primary EIDE channel is routed to the J5 User I/O connector for interfacing to two Compact FLASH cards on the transition module.

USB Interface

The PBC contains a USB Host Controller (HC) that includes the root hub and two USB ports with built-in physical layer transceivers. This allows direct connection of two USB peripherals without an external hub. External hubs can be connected to either port to support additional peripherals. The PBC host controller completely supports the standard Universal Host Controller Interface (UHCI)

Each USB port is routed to the J3 User I/O connector to interface with the transition module. The MCPN750A SBC provides monitoring for each USB channel VCC output. Fusing for the USB VCC outputs is provided on the Transition Module. Refer to the TM-PIMC-0001or the TMCPN710 Transition Module Installation and Use manual for more information.

ISA Interrupt Controller

The PBC contains two 8259 interrupt controllers to support ISA interrupts. The PBC supports programmable interrupt routing and programmable edge or level triggering. Refer to the MCPN750A CompactPCI Single Board Computer Programmers Reference Guide (MCPN750A/PG) for interrupt routing information.

ISA DMA Channels

The PBC supports seven 8237 compatible DMA channels. ISA compatible type A, B and F timing is supported. These DMA channels are not used since there are no ISA DMA devices.

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