CMI9761A Datasheet, PDF (11/23 Pages) List of Unclassifed Manufacturers – C-Media CMI9761A / 9761A+ 6 Channel AC97 2.3 Audio Codec

CMI9761A/9761A+ DataSheet
2004/02/09, Rev 1.2
5. Pin / Signal Descriptions
5.1 Power / Ground
The digital portion of CMI9761A/9761A+ operates at 3.3V and the
analog portion operates at 5V. The grounds should be separated well
to assure the best analog audio quality.
Pin No Signal Name Type
Description
1
DVDD1
I Digital VDD (3.3V)
4
DVSS1
I Digital ground
7
DVSS2
I Digital ground
9
DVDD2
I Digital VDD (3.3V)
25 AVDD1
I Analog VDD (5V)
26 AVSS1
I Analog ground
38 AVDD2
I Analog VDD (5V)
42 AVSS2
I Analog ground
5.2 AC-Link / Clocking
These signals connect CMI9761A/9761A+ to its AC’97 controller
counterpart and external crystal / oscillator clock source.
Pin No Signal Name Type
Description
2
XTL_IN
24.576 MHz crystal input or 14.318
I
MHz oscillator input
3
XTL_OUT
24.576 MHz crystal output or NC (for
O
14.318 MHz oscillator input)
Serial, time division multiplexed, input
5
SDATA_OUT I
stream from the AC’97 controller.
6
BIT_CLK
O 12.288 MHz bit clock output
Serial, time division multiplexed,
8
SDATA_IN O
output stream to the AC’97 controller.
10 SYNC
I 48 kHz sample sync
11 RESET#
I AC’97 master H/W reset
Note: # denotes active low
Copyright 2003-2004 © C-Media Electronics Inc.
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