F71806 datasheet(18/109 Pages) FINTEK

18 / 109 page

July, 2007

V0.26P

F71806

as below:

PCIRST1#

Output buffer of RSTCON# and LRESET#.

PCIRST2#

Output buffer of RSTCON# and LRESET#.

PCIRST3#

Output buffer of RSTCON# and LRESET#.

PCIRST4#

Output buffer of RSTCON#, LRESET# and PCIRSTIN#

PCIRST5#

Output buffer of RSTCON#, LRESET# and PCIRSTIN#

Delay

+3.3V

S3#

ATXPG

RSTCON#

PWROK1/2

RSTCON#

LRESET#

PCIRST1~3#

PCIRSTIN#

PCIRST4~5#

Delay

+3.3V

S3#

ATXPG

RSTCON#

PWROK1/2

RSTCON#

LRESET#

PCIRST1~3#

PCIRSTIN#

PCIRST4~5#

So far as the PWROK issue is as above figure. PWROK is delayed 400ms (default) as VCC arrives 2.8V,

and the delay timing can be programmed by register. (100ms ~ 400ms)

In the figure, the RSTCON# will be implemented by register RSTCON_EN. If RSTCON_EN be set to 0, the

RSTCON# pin will affect PWROK outputs. If RSTCON_EN be set to 1, the RSTCON# pin will affect PCIRST

outputs (Default).

6.4 Hardware Monitor

6.4.1

Analog Input

The F71806 provides 8 pins (8-bit) ADC voltage inputs. These input voltages should be positive and is limited

at range of 0v to 2.048V. The minimum resolution (1-LSB) is 8mV. If the voltage is over this range, the divider

resistor must be added and the divided voltage is also in the range of 0V to 2.048V.

The maximum input voltage of the analog pin is 2.048V because the 8-bit ADC has a 8mv LSB. Really, the

application of the PC monitoring would most often be connected to power suppliers. The voltage range of 0V to

2.048V can be connected to these analog inputs. The 3.3V and VSB5V should be reduced a factor with external

resistors so as to obtain the input range..

There are 8 voltage inputs in the F71806 and the voltage divided formula is shown as follows:

VIN

For instance, where

V+12V is the analog input voltage.

If we choose R1=27K, R2=5.1K, the exact input voltage for V+12v will be 1.907V, which is within the

tolerance. As for application circuit, it can be refer to the figure shown as follows.

F71806 Datasheet(PDF) 18 Page - Feature Integration Technology Inc.

F71806 Datasheet(HTML) 18 Page - Feature Integration Technology Inc.

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