W83627DHG-PT Nuvoton Technology Corporation of America, W83627DHG-PT Datasheet - Page 68

• Manufacturer Part Number: W83627DHG-PT
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627DHG-PT

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

W83627DHG-P/W83627DHG-PT
8.7
Interrupt Detection
8.7.1
SMI# Interrupt Mode
The SMI#/OVT# pin (pin 5) is a multi-function pin. It can be in SMI# mode or in OVT# mode by setting
Configuration Register CR [29h], bit 6 to one or zero, respectively. In SMI# mode, it can monitor
voltages, fan counts, or temperatures.
8.7.1.1. Voltage SMI# Mode
The SMI# pin can create an interrupt if a voltage exceeds a specified high limit or falls below a
specified low limit. This interrupt must be reset by reading all the interrupt status registers, or
subsequent events do not generate interrupts. This mode is illustrated in the following figure.
High limit
Fan Count limit
Low limit
SMI#
SMI#
*
*
*
*
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 8-19 SMI Mode of Voltage and Fan Inputs
8.7.1.2. Fan SMI# Mode
The SMI# pin can create an interrupt if a fan count crosses a specified fan limit (rises above it or falls
below it). This interrupt must be reset by reading all the interrupt status registers, or subsequent
events do not generate interrupts. This mode is illustrated in the figure above.
Publication Release Date: July 09, 2009
-58-
Version 1.94