Akai ADP-841, Service Manual

Page: 21 / 39

MT1389 B/ C
PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE
8
MTK Confidential A
FOR SZ_MTK USE ONLY
Pin Main Alt. Type Description
220 ASDATA3
Inout
4MA
PD SMT
1) Audio serial data 3 (Center-back/
Center-left-back/Center-right-back, in 6.1 or 7.1 mode)
2) DSD data right surround channel
3) Trap value in power-on reset :
I) 1 : manufactory test mode
II) 0 : normal operation
4) While only 2 channels output:
I) GPIO
222 ASDATA4 INT1#
Inout
4MA
PD SMT
1) Audio serial data 4 (Down-mixed Left/Right)
2) DSD data center channel
3) Trap value in power-on reset :
I) 1 : manufactory test mode
II) 0 : normal operation
4) While only 2 channels output:
I) Microcontroller external interrupt 1
II) GPIO
224 MC_DATA INT2# Inout
1) Microphone serial input
2) While not support Microphone:
I) Microcontroller external interrupt 2
II) GPIO
225 SPDIF
Output
2~16MA,
SR : ON/OFF
SPDIF output
Video Interface ( 18 )
189 DACVDDC Power 3.3V power pin for VIDEO DAC circuitry
190 VREF Analog Bandgap reference voltage
191 FS Analog Full scale adjustment
192 YUV0 CIN
Output
4MA, SR
1) Video data output bit 0
2) Compensation
capacitor
193 DACVSSC Ground Ground pin for VIDEO DAC circuitry
194 YUV1 Y
Output
4MA, SR
1) Video data output bit 1
2) Analog Y output
195 DACVDDB Power 3.3V power pin for VIDEO DAC circuitry
196 YUV2 C
Output
4MA, SR
1) Video data output bit 2
2) Analog
chroma output
197 DACVSSB Ground Ground pin for VIDEO DAC circuitry
198 YUV3 CVBS
Output
4MA, SR
1) Video data output bit 3
2) Analog
composite output
199 DACVDDA Power 3.3V power pin for VIDEO DAC circuitry
200 YUV4 Y/G
Output
4MA, SR
1) Video data output bit 4
2) Green or Y
201 DACVSSA Ground Ground pin for VIDEO DAC circuitry
202 YUV5 B/Cb/Pb
Output
4MA, SR
1) Video data output bit 5
2) Blue
or CB