Usb Interface; Lpc Interface; Audio Codec Interface; Diverse Device - Micros Systems Workstation 5 Service Manual

Workstation 5 System Board Technical Descriptions
CS5536 Companion Device
The interface provides a variety of features to optimize system
performance, including 32-bit disk access, post write buffers, bus master,
look-ahead read buffer, and pre-fetch mechanism.
On the WS5 System Board, the CF Card resides on the ATA Interface in
socket IDE1.

USB Interface

The CS5536 Companion Device includes four Universal Serial Bus (USB)
2.0 compliant ports, supporting low speed, full speed, and high-speed
connections.
Each port supports wake-up events and feature over-current and power
control support. The ports can be enabled individually to react to
over-current events.
Port 4 supports the USB 2.0 On-The-Go supplement version 1.0
specification, but this feature is not supported on the WS5 system board.
One USB output from the Companion Device is fed to an on-board USB
hub controller. See the System Board USB Interface Section for more
information.

LPC Interface

The LPC is based on Intel's Low Pin Count (LPC) specification version
1.0. The controller can convert an internal local bus memory or IO cycle to
an external LPC cycle. It receives serial IRQs from the LPC bus and
converts them to parallel form so they can be routed to the IRQ mapper and
interacts with the Legacy DMA logic to perform DMA between on-chip
and off-chip devices.
The LPC interface supports memory, I/O, DMA, and firmware hub based
devices.

Audio Codec Interface

The codec interface is AC97 V2.3 compliant and contains support for any
AC97 audio codec with Sample Rate Conversion (SRC). The WS5 System
board uses a Realtek ALC203 Audio Codec and audio amplifier to drive a
pair of internal speakers. See the AC 97 Audio Interface section for more
information.

Diverse Device

The Diverse Device is comprised of the legacy PC functionality required
for most designs.
Workstation 5 Field Service Guide 2-9