NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 61

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

W83627UHG/NCT6627UD
7.7
Interrupt Detection
7.7.1 SMI# Interrupt Mode
The SMI#/OVT# pin (pin 95) 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.
7.7.1.1. 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 7-17 SMI Mode of Voltage and Fan Inputs
7.7.1.2. 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.
7.7.1.3. Temperature SMI# Mode
The SMI# pin can create interrupts that depend on the temperatures measured by SYSTIN and CPUTIN. These
interrupts are divided into two parts, one for SYSTIN and the other for CPUTIN.
7.7.1.3.1. Temperature Sensor 1(SYSTIN) SMI# Interrupt
The SMI# pin has three interrupt modes with SYSTIN.
5. Comparator Interrupt Mode
This mode is enabled by setting T
(Temperature Hysteresis) to 127°C.
HYST
Publication Release Date: October 26, 2010
-52-
Revision 1.7