ALC202 데이터 시트보기 (PDF) - Realtek Semiconductor

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ALC202

TWO CHANNEL AC97 AUDIO CODEC

Realtek Semiconductor 

ALC202/ALC202A

6.3.2 MX78 GPIO Status

Default: 0000h

Bit Type

Function

15:10

9

8

7

6

5

4

3

2

1

0

Reserved

R/W GPIO1 Output Control:

1: Drive GPIO1 high

0: Drive GPIO1 low

R/W GPIO0 Output Control:

1: Drive GPIO0 as high

0: Drive GPIO0 as low

R/W DCVOL Interrupt Status: (DCVOL_IS)

1: DCVOL interrupt 0: No DCVOL interrupt

DCVOL_IS= (MX76.7=1)&(MX74.[4:0] is changed).

Write 1 to clear this status bit.

R/W JD Interrupt Status: (JD_IS)

1: JD interrupt

0: No JD interrupt

JD_IS= (MX78.2=1)&(MX76.6=1) & (JD low-to-high transition).

Write 1 to clear this status bit.

R/W GPIO1 Interrupt Status: (GPIO1_IS). (When GPIO1 is used as input)

1: GPIO1 interrupt

0: No GPIO1 interrupt

GPIO1_IS= (MX76.1=0)&(MX76.5=1) & (GPIO1 low-to-high transition).

Write 1 to clear this status bit.

R/W GPIO0 Interrupt Status: (GPIO0_IS). (When GPIO0 is used as input)

1: GPIO0 interrupt

0: No GPIO0 interrupt

GPIO0_IS= (MX76.0=0)&(MX76.4=1) & (GPIO0 low-to-high transition)

Write 1 to clear this status bit.

NA Reserved

R Jack-Detect Event: (JDEVT)

1: Jack-Detect event has occurred

0: No Jack-Detect event has occurred

JDEVT = MX7A.1

R GPIO1 Input Status:

1: GPIO1 is driven high by external device (input)

0: GPIO1 is driven low by external device (input)

R GPIO0 Input Status:

1: GPIO0 is driven high by external device (input)

0: GPIO0 is driven low by external device (input)

GPIO interrupt (GPINT) in bit0 of SDATA_IN’s slot-12 = (MX78.4 | MX78.5 | MX78.6 | MX78.7).

When GPIO1/0 is used as input pin, its status will be also reflected in bit2/1 of SDIN’s slot-12. Once GPIO1/0 is used as

output pin, the bit2/1 of SDATA_IN’s slot-12 is always 0.

The GPIOx is internally pulled high by a weak resistor.

2002/07/30

22

Rev.1.28

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