W83627THF_06 Datasheet, PDF (38/142 Pages) Winbond – Winbond LPC I/O

W83627THF/W83627THG
5.5.3 Manual Control Mode
Smart Fan control system can be disabled and the fan speed control algorithmic can be programmed
by BIOS or application software. The programming method is just as section 5.4.2.
5.6 SMI# interrupt mode
The SMI#/IRQIN1 pin(pin2) is a multi-function pin. The SMI# function is selected at Configuration
Register CR[2Ah] bit 2.
5.6.1 Voltage SMI# mode :
SMI# interrupt for voltage is Two-Times Interrupt Mode. Voltage exceeding high limit or going below
low limit will causes an interrupt if the previous interrupt has been reset by reading all the interrupt
Status Register. (Figure 5-12 )
5.6.2 Fan SMI# mode :
SMI# interrupt for fan is Two-Times Interrupt Mode. Fan count exceeding the limit, or exceeding and
then going below the limit, will causes an interrupt if the previous interrupt has been reset by reading
all the interrupt Status Register. (Figure 5-13 )
High limit
Low limit
Fan Count limit
SMI#
*
*
*
*
SMI#
*Interrupt Reset when Interrupt Status Registers are read
*
*
Figure 5-12
Figure 5-13
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Publication Release Date: September 26, 2006
Revision 1.2