PC87427 datasheet(12/46 Pages) NSC

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1.0 Signal/Pin Connection and Description (Continued)

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Revision 1.0

1.4.6

Health Monitoring & Control (HMC)

1.4.7

Keyboard and Mouse Controller (KBC)

Signal

Pin(s)

I/O Buffer Type Power Well

Description

LMPCIF

I/O

INSM/OD6

VSB

LMPC Sensor Interface. Bidirectional, SensortPath

proprietary interface signal to LMPC sensor device(s). An

internal pull-up for this pin is optional.

THRMTRIP1-2

21, 22

INTS

VDD

Thermal Trip Inputs. Indicates that a thermal trip from a CPU

occurred.

VRMTHRM

INTS

VDD

VRM Thermal Warning. Thermal warning from a VRM of a

CPU.

Signal

Pin(s)

I/O Buffer Type Power Well

Description

KBCLK

125

I/O

INTS/OD14

VDD

Keyboard Clock. Keyboard clock signal. An external pull-up

resistor is required for PS/2 compliance. This pin is monitored

during VDD power-off for wake-up event detection.

KBDAT

126

I/O

INTS/OD14

VDD

Keyboard Data. Keyboard data signal. An external pull-up resistor

is required for PS/2 compliance. This pin is monitored during VDD

power-off for wake-up event detection.

MCLK

127

I/O

INTS/OD14

VDD

Mouse Clock. Mouse clock signal. An external pull-up resistor is

required for PS/2 compliance. This pin is monitored during VDD

power-off for wake-up event detection.

MDAT

128

I/O

INTS/OD14

VDD

Mouse Data. Mouse data signal. An external pull-up resistor is

required for PS/2 compliance. This pin is monitored during VDD

power-off for wake-up event detection.

KBRST

122

I/O

INT/OD8,

O4/8

VDD

KBD Reset. Keyboard reset (P20) quasi-bidirectional signal.

GA20

123

I/O

INT/OD8,

O4/8

VDD

Gate A20. KBC gate A20 (P21) quasi-bidirectional signal.

P12

121

I/O

INT/OD8,

O4/8

VDD

I/O Port. KBC quasi-bidirectional signal for general-purpose input

and output (controlled by KBC ﬁrmware).

P16, P17

75, 66

I/O

INT/OD8,

O4/8

VDD

I/O Port. KBC quasi-bidirectional signal for general-purpose input

and output (controlled by KBC ﬁrmware).

PC87427 Datasheet(PDF) 12 Page - National Semiconductor (TI)

PC87427 Datasheet(HTML) 12 Page - National Semiconductor (TI)

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