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July, 2007

V0.28P

LED

VSB3V

LED control output. The multi-function pin is selected by

register, so does the freq. programming

IRQ

VSB3V

IRQ and SMI# function

WDTOUT11#

VSB3V

The 1

System reset signal when the Reset-Out timer is time

out. This pin will generate 100mS pulse (default) when

the Reset-Out timer is timeout.

4 ~ 9

VIDIN[0:5]

VSB3V

CPU Voltage ID input

GPIO13

General purpose I/O pin.

3

I2C_ADDR

VSB3V

The GPIO serial bus hardware power on setting pin.

Default address is 0x9C (when I2C_ADDR=0).

Another

one is 0x6E (when I2C_ADDR=1). This pin internal

pull-down 100k to Ground. If this pin is pull-up 10k to

VSB3V, this pin will be trapped to 1.

13

SDATA

VSB3V

SMbus data.

14

SCLK

VSB3V

SMBus clock

15

RSTOUT#

VSB3V

System reset signal when the Reset-Out timer is time

out. This pin will generate 100mS pulse when the

Reset-Out timer is timeout.

17

SLOTOCC#

VBAT

Powered by VBAT. CPU detect pin.

24 ~ 19

VIDOUT[0:5]

VSB3V

CPU Voltage ID output.

28

SEL

VSB3V

Default pull up to 3VSB.

2,27,26,25

GPIO[30:33]

VSB3V

General purpose I/O pins.

6. Functional Description

6.1 General Description

The F75122 provides VIDIN, VIDOUT function. It can latch the VIDIN from CPU side, and output VIDOUT to

PWM. The VIDOUT value can be programmed by the interface GPIO Serial Bus serial interface.

Dedicate GPIO functions. That includes two set watchdog timer. The watchdog timer timeout unit is set to second

and range is 0 to 31 seconds. When the timeout has occurred, that will generate a status bit to indicate it and write

one will be clear.

All GPIO can be programmed to logic one or zero or high pulse or low pulse.