Iei-integration ICE-DB-T6 Manuale Utente Scaricare il pdf (Pagina 62)

Type 6 Carrier Board Design Guide

Page 52

Pin Signal I/O Description

A30 AC_RST# O 3.3VSB CMOS CODEC Reset.

A29 AC_SYNC O 3.3V CMOS 48kHz fixed-rate, sample-synchronization signal to

the CODEC(s).

A32 AC_BITCLK O 3.3V CMOS 12.228 MHz Serial Bit Clock for CODEC.

A33 AC_SDOUT O 3.3V CMOS Serial TDM data output to the CODEC.

B30

B29

B28

AC_SDIN0

AC_SDIN1

AC_SDIN2

I 3.3VSB CMOS Serial TDM data inputs from up to 3 CODECs

Table 3-16: Audio Signals Description

3.8 Reference Circuit

Please refer to the schematic diagram of the baseboard. IEI ICE-DB-T6 reference carrier

board is embedded with the Realtek ALC892 audio controller. For the detailed

specifications of the Realtek ALC892, please go to

http://www.realtek.com/ .

3.8.1 Audio Routing Guideline

3.8.1.1 Analog Power Delivery

Clean analog power delivery to the audio codec and other audio components utilizing the

5-V analog supply is critical. Excessive system noise on this supply will degrade the entire

audio sub-system. Except the GND signal, users can use independent LDO to generate

clean audio analog power.

+V5_AUDIO

EC12

100U_SMD6_3_EC_25V

FB9 FB_80_6_600MA

C188

0.1U_4_Y _16V

GS78L05N_TO92_3

TO92_123

VOUT

VIN

GND

+V12

Figure 3-22: Audio Analog Power Example

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Iei-integration ICE-DB-T6 Manuale Utente Pagina 62