Gpio; Lpc; Smbus - Oracle MICROS Workstation 5A Setup Manual

What's Inside?
System Board Description
The WS5A System Board uses a Realtek ALC268-VB1 HDA Codec. The
WS5A includes two internal speakers mounted to the left and right side of
the base. A two watt per channel amplifier drives the speakers. In addition,
the I/O panel includes Microphone Input and Line Output connectors.

GPIO

The ICH8M includes a number of General Purpose Input/Output lines that
are used to implement many custom functions and actions. Typical uses
include USB port control switches, and items such as +12V or +24V cash
drawer voltages

LPC

The ICH8M implements an LPC interface based on the Low Pin Count
Interface Specification Revision 1.1.
Several devices are connected to the LPC Bus. CPLD U75, Super IO U22,
and TPM module U24. J7 is a header for a LPC compatible POST Code
Reader.

SMBus

The ICH8M contains an System Management Bus (SMBus) Host interface
that allows the processor to communicate with SMBus Slaves. This
interface is compatible with most I2C devices. Special I2C commands are
implemented.
The SMBus also implements hardware based Packet Error Checking for
data robustness and the Address Resolution Protocol (ARP) to dynamically
provide addresses to all SMBus devices.
System Board SM Bus devices include SMBus Repeaters U45/U65 and
Temperature Monitor U47.
3-20 Workstation 5A Setup Guide - Fourth Edition