W83977EG-AW Datasheet, PDF(20/142 Page) Nuvotem Talema – These products are not designed for use in life support appliances

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W83977EG-AW Datasheet, PDF (20/142 Pages) Nuvotem Talema – These products are not designed for use in life support appliances

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W83977EF-AW/W83977EG-AW

4.7 KBC Interface

SYMBOL

KDATA

MDATA

KCLK

MCLK

GA20

GP11

(IRQIN2)

KBRST

GP12

(WDTO)

KBLOCK

GP13

I/O

I/O16u

I/O12t

INts

I/O16t

FUNCTION

Keyboard Data

PS2 Mouse Data

Keyboard Clock

PS2 Mouse Clock

KBC GATE A20 (P21) Output. (CR2A bit 6 = 0, default)

General purpose I/O port 1 bit 1. (CR2A bit 6 = 1)

Alternate Function from GP11: Interrupt channel input.

W83C45 Keyboard Reset (P20) Output. (CR2A bit 7 = 0, default)

General purpose I/O port 1 bit 2. (CR2A bit 7 = 1)

Alternate Function 1 from GP12 : Watchdog timer output.

W83C45 KINH (P17) Input. (CR2B bit 0 = 0, default)

General purpose I/O port 1 bit 3. (CR2B bit 0 = 1)

4.8 POWER PINS

SYMBOL

VCC

VSB

GND

20, 55, 85,

115

25, 62, 90,

120

FUNCTION

+5V power supply for the digital circuitry

+5V stand-by power supply for the digital circuitry

Ground

4.9 ACPI Interface

SYMBOL PIN

I/O

VBAT

XTAL1

INC

XTAL2

O8t

battery voltage input

32.768Khz Clock Input

32.768Khz Clock Output

FUNCTION

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