ALC202 데이터 시트보기 (PDF) - Realtek Semiconductor

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ALC202

TWO CHANNEL AC97 AUDIO CODEC

Realtek Semiconductor 

ALC202/ALC202A

5. Pin Description

In order to reduce pin count, and therefore size and cost, some pins have multiple functions. In those cases, the functions are

separated with a “/” symbol. Refer to the Pin Assignment diagram for a graphical representation.

5.1 Digital I/O Pins

Name

RESET#

XTL-IN

Type

I

I

XTL-OUT O

SYNC

I

BIT-CLK IO

SDATA-OUT I

SDATA-IN O

GPIO0

I/O

GPIO1

I/O

ID0#

I

ID1#

I

EAPD/JD O

SPDIFO/ TEST O

Pin No

11

2

3

10

6

5

8

43

44

45

46

47

48

Description

AC'97 H/W reset

Crystal input pad

Crystal output pad

Sample Sync (48KHz)

Bit clock output

(12.288Mhz)

Serial TDM AC97 output

Serial TDM AC97 input

I: General purpose input

pin-0. (Can be software

volume up)

O: General purpose output

pin-0.

I: General purpose input

pin-1.

(Can be software volume

down)

O: General purpose output

pin-1

ID strap 0 and PLL Control

ID strap 1 and PLL Control

External Amplifier power

down control / Jack –Detect

sense a low to high edge.

S/PDIF output / TEST

output.

Characteristic Definition

Schmitt trigger input

Crystal: 24.576M/14.318M crystal input

External: 24.576M/14.318M external clock input

Crystal: 24.576M/14.318M crystal output

External: 24.576M/14.318M clock output

Schmitt trigger input

CMOS input/output Vt=0.35Vdd

Schmitt trigger input

CMOS output

Internally pulled high by a 50K resistor

Internally pulled high by a 50K resistor

CMOS input Vt=0.35Vdd, internally pulled high by a 50K

resistor

CMOS input Vt=0.35Vdd, internally pulled high by a 50K

resistor

CMOS output / input, JD should be internally pulled high

by a 50K resistor

Digital output has 12 mA@75Ω driving capability

Total: 13 Pins

2002/07/30

6

Rev.1.28

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