Akai A-4162, Service Manual, Page: 19 / 28

MT1389E
PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE
8
MTK Confidential A
Pin Main Alt. Type Description
183 ARS GPIO Output
1) Audio DAC right Surround channel output
2) While internal audio DAC not used: GPIO
184 AR GPIO Output
1) Audio DAC right channel output
2) While internal audio DAC not used:
a. SDATA1
b. GPIO
185 AVCM Analog Audio DAC reference voltage
186 AL GPIO Output
1) Audio DAC left channel output
2) While internal audio DAC not used:
a. SDATA2
b. GPIO
187 ALS GPIO Output
1) Audio DAC left Surround channel output
2) While internal audio DAC not used:
a. SDATA0
b. GPIO
188 ALF GPIO Output
1) Audio DAC center channel output
2) While internal audio DAC not used: GPIO
189 ADACVDD1 Power 3.3V power pin for audio DAC circuitry
190 ADACVDD2 Power 3.3V power pin for audio DAC circuitry
Video Interface (12)
160 DACVDDC Power 3.3V power pin for video DAC circuitry
161 VREF Analog Bandgap reference voltage
162 FS Analog Full scale adjustment
163 DACVSSC Ground Ground pin for video DAC circuitry
164 CVBS
Output
4mA, SR
Analog composite output
165 DACVDDB Power 3.3V power pin for video DAC circuitry
166 DACVSSB Ground Ground pin for video DAC circuitry
167 DACVDDA Power 3.3V power pin for video DAC circuitry
168 Y/G
Output
4mA, SR
Green, Y, SY, or CVBS
169 DACVSSA Ground Ground pin for video DAC circuitry
170 B/CB/PB
Output
4mA, SR
Blue, CB/PB, or SC
171 R/CR/PR
Output
4mA, SR
Red, CR/PR, CVBS, or SY
MISC (12)
101 PRST#
Input
PU, SMT
Power on reset input, active low
100 ICE
Input
PD, SMT
Microcontroller ICE mode enable
193 XTALO Output 27MHz crystal output