ALC250 Просмотр технического описания (PDF) - Unspecified
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ALC250 Datasheet PDF : 46 Pages
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ALC250 Data Sheet
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 Pin No
I
11
I
2
XTL-OUT O
3
SYNC
I
10
BIT-CLK
O
6
SDATA-OUT I
5
SDATA-IN O
8
SCK
I
43
SDA
IO 44
XELSEL
I
46
SPDIFI/EAPD I/O 47
SPDIFO
O
48
Description
AC'97 H/W reset
Crystal input pad
Crystal output pad
Sample Sync (48KHz)
12.288MHz bit clock output
Serial TDM input from
AC’97 controller
Serial TDM AC’97 Codec
output
Serial bit clock input
Serial data input/output
Pulled low to use external
14.318MHz clock source
S/PDIF input / External
Amplifier power down
control
S/PDIF 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 output
CMOS input , Vt=1.65V
CMOS output
Schmitt trigger input, VIL=1.0V, VIH=2.0V
Schmitt trigger input, VIL=1.0V, VIH=2.0V
CMOS input, Vt=0.35Vdd, internally pulled high by a 50K
resistor.
CMOS input / output
Digital output has 12 mA@75Ω driving capability.
Total: 12 Pins
5.2 Analog I/O Pins
Name
PC-BEEP
PHONE
AUX-L
AUX-R
JD2
JD1
CD-L
CD-GND
CD-R
MIC1
MIC2
LINE-IN-L
LINE-IN-R
LINE-OUT-L
LINE-OUT-R
HP-OUT-L
HP-OUT-R
MONO-OUT/
VREFOUT3
Type
I
I
IO
IO
I
I
I
I
I
I
I
I
I
O
O
IO
Pin No
12
13
14
15
16
17
18
19
20
21
22
23
24
35
36
39
IO 41
O
37
Description
PC speaker input
Speakerphone input
AUX Left channel
AUX Right channel
Jack Detect pin-2
Jack Detect pin-1
CD audio Left channel
CD audio analog GND
CD audio Right channel
First MIC input
Second MIC input
Line input Left channel
Line input Right channel
Line-Out Left channel
Line-Out Right channel
Headphone Out Left
channel
Headphone Out Left
channel
Mono output /
Third reference voltage
Characteristic Definition
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input/output
Analog input/output
Internally pulled high to AVDD by a 50K resistor
Internally pulled high to AVDD by a 50K resistor
Analog input (1.6Vrms)
Analog input
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog output w/o amplifier
Analog output w/o amplifier
ALC250: Analog output with amplifier / Analog input
ALC250: Analog output with amplifier / Analog input
Analog output / Voltage output (2.5V/4.0V)
Total: 18 Pins
Two Channel AC’97 2.3 Audio Codec
5
Tel: +49(0)234-9351135 · Fax: +49(0)234-9351137 E-MAIL: info@cornelius-consult.de
Rev1.01
http://www.cornelius-consult.de
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