Service Manual

MT8206
PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE
Item Symbol Pin # Type Description
Audio FE (6)
1 AADCVDD E24 Power 3.3v Audio front end power
2 MPX1 B26 I Audio Frequency input0
3 MPX2 C26 I Audio Frequency input1
4 AADCVSS D24 GND Audio front end ground
5 TN2 C25 I/O negative Audio ADC reference pin
6 TP2 B25 I/O
1) positive Audio ADC reference pin
2) bypass CVBS video output pin
Audio DAC (6)
1 ADACVDD C24 Power 3.3v Audio front end power
2 ACENT B24 I/O
1) Audio DAC output
2) I2S , ASDATA2
3) GPIO
3 AVICM A24 Audio DAC input common voltage
4 AL A25 I/O
5 AR A26 I/O
1) Audio DAC output
2) I2S , ASDATA0
3) GPIO
1) Audio DAC output
2) I2S , ASDATA1
3) GPIO
6 ADACVSS D23 GND Video ADC Voltage Reference N0
4.2 NOTICES ABOUT GPIOS:
There are considerably various I/O pins provided by MT8206EG, but some of them are shared by
other function, here we notice some conditions when you use.
� When GPIO have to active in power saving mode
1. GPIOs in Stand by mode means UP30, UP31, UP34 and UP35 can be used.
2. Servo ADs can be also used when power saving mode
3. GPIOs which are sharing with servo AD can be also used when power saving mode.
�GPIO use DE pin
DE pin is also use for trapping when VGA download have to use. So DE pin should be used carefully.
June, 2006