Preliminary

Avance Logic, Inc.

ALC202

- 26 -

Rev0.62

http://www.realtek.com.tw

6.2.8 AC-Link IO Pin Capacitance and Loading:

Output Pin

1 Codec

2 Codec

3 Codec

4 Codec

BIT_CLK (must support ³ 2 Codecs)

55pF

62.5pF

75pF

85pF

SDATA_IN

47.5pF

55pF

60pF

62.5pF

6.2.9 SPDIF output:

SPDIF_OUT

Min

Typ

Max

Unit

Rise time/fall time

0

10

%

Duty cycle

45

55

%

Note :

90%

50%

10%

6.2.10 BIT-CLK and SDATA-IN state when RESET# is active:

When RESET# is active the BIT-CLK and SDATA-IN must be floating by internal pull low 100K

resistors. So the ac-link signals are driven by another AC’97 on CNR board. This requirement is not

mentioned in AC’97 specification rev2.1, please refer CNR (Communication Network Riser)

specification rev1.0 page23~25 to get detail information.

7. Analog Performance Characteristics

1KHz input sine wave; Sampling frequency=48KHz; 0dB=1Vrms

0dB attenuation; tone and 3D disabled

Parameter

Min

Typ

Max

Units

Full scale input voltage

Line inputs (Mixers)

Line inputs (A/D)

Mic input (0 dB)

Mic input (20 dB boost)

-

-

-

-

1.6

1.2

1.6

0.16

-

-

-

-

Vrms

Full scale output voltage

LINE-OUT

HEADPHONE-OUT

-

-

1.0

1.7

1.50

-

Vrms

Vrms