82443MX Datasheet, PDF (145/173 Pages) Intel Corporation – PCIset

82443MX PCIset
For additional information on the functionality of the USB Host Controller, refer to the Universal Host
Controller Interface (UHCI) Design Guide, Revision 1.1 (Order number 297650-002). Note that the UHCI
Design Guide refers to USB ports 1 and 2. The 440MX USB ports are ports 0 and 1, respectively.
Additions to the 440MX USB interface beyond UHCI, revision 1.1 include support for over-current detection on
USB ports 0 and 1. If an over-current condition is detected on a USB port, that port will be disabled. Bits 10:11
in each Port Status and Control Register are used to report over-current conditions.
Client Software
Software
Universal Serial Bus Driver
(USBD)
Hardware
Universal Host Controller
Driver (HCD)
Universal Host Controller (HC)
USB
USB
USB Device
USB Device
Universal Host
Controller Interface
(UHCI)
usb_blk
Figure 21. USB System Conceptual View
7.12 IDE Interface
The 440MX integrates a high performance PCI-to-IDE interface, which has one physical channel adapter and
supports two drives (drive 0 and drive 1) This interface is capable of accelerated PIO data transfers as well
as acting as a PCI bus master on behalf of an IDE DMA slave device. The 440MX provides an interface for a
single IDE connector.
All IDE data transfer command strobes, DMA request and grant signals, address and data lines, and the
PIORDY signal interface directly to the 440MX. These lines correspond to the Primary IDE channel.
Only PCI masters have access to the IDE port. Memory targeted by the IDE interface acting as a PCI bus
master on behalf of IDE DMA slaves must reside on the PCI or in the main memory implemented by the
440MX.
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