PC87373 datasheet(21/174 Pages) NSC

21 / 174 page

1.0 Signal/Pin Connection and Description (Continued)

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Revision 1.1

1.4.8

General-Purpose I/O (GPIO)

1.4.9

Fan Speed Control and Monitor (FSCM)

Signal

Pin(s)

I/O Buffer Type Power Well

Description

GPIOE00-07 103-106,

108-109,

111-112

I/O

INTS/

OD8,O4/8

VSB3

General-Purpose I/O Ports. Each pin is configured

independently as input or I/O, with or without static pull-up and

with either open-drain or push-pull output type. These pins

have event detection capability to generate a wake-up event

or an interrupt.

GPIOE10-13 116, 114,

115, 113

GPIO14

101

I/O

INTS/

OD12,O6/12

General-Purpose I/O Port. This pin is configured

independently as input or I/O with or without static pull-up and

with either open-drain or push-pull output type.

Signal

Pin(s)

I/O Buffer Type Power Well

Description

FANTACH1

FANTACH2

FANTACH3

111,

112,

104

IINTS

VDD3

Fan Tachometer Inputs. Input to the Fan Speed Monitor for the

fan tachometer pulse. The rising edge indicates the completion of

either a half or full fan revolution.

FANPWM1

FANPWM2

FANPWM3

106,

108,

109

O4/8

VDD3

Fan Control Outputs. Pulse Width Modulation (PWM) signals,

used to control the speed of cooling fans by controlling the On/Off

duty cycle, and thus the voltage supplied to the fan motor.

PC87373 Datasheet(PDF) 21 Page - National Semiconductor (TI)

PC87373 Datasheet(HTML) 21 Page - National Semiconductor (TI)

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