Sony CDX-C8850R Service Manual page 34

• IC500 MB90574APMT-G-215-BND (SYSTEM CONTROL) (MAIN BOARD)
Pin No. Pin Name
1, 2 RE IN0, 1
3 TIR BUSY
4 TIR PDOWN
5 TIR RST
6 SYS RST
7 BUS ON
8 VCC
9 DSPSTP
10 TIR PLAY
11 CSV PLAY
12 RX/FLS SI
13 TX/FLS SO
14 FLS WR
15 BEEP
16 CSV ON
17 DSP SI
18 DSP SO
19 DSP CK
20 UNI SI
21 UNI SO
22 UNI CK
23 SD IN
24 SIRCS
25 CSV SI
26 CSV SO
27 CSV CK
28 DSP RST
29 ST/MONO
30 DSP XMST
31 WIDE
32 NARROW
33 VSS
34 C
35 RAM BU
36 MUTE
37 ASEL0
38 DVCC
39 DVSS
40 ASEL1
41 LCD ANG
42 AVCC
43 AVRH
44 AVRL
45 AVSS
46 VSM
47, 48 KEY IN0, 1
49 RC IN0
50 DST SEL0
51 DST SEL1
52 QUALITY
53 MPT
54 VCC
34
I/O
I Rotary encoder input
I TIR reception audio recording IC operation mode input ("H" : BUSY)
O TIR reception audio recording/playback IC operation mode setting output
O TIR reception audio recording IC reset output
O Reset output for SONY BUS slave micon.
O SONY BUS ON output
— Power supply pin (+5 V)
O Digital signal processor master clock control output
O AM reception/TIR playback select output ("L" : TIR playback)
O Voice guide sound/Digital signal processor sound select output
I FLASH write communication input
O FLASH write communication output
I FLASH write mode select input
O Beep output
O CSV control IC power supply control output
I Serial data input from digital signal processor.
O Serial data output to digital signal processor.
O Serial data shift clock output to digital signal processor.
I SONY BUS serial data input
O SONY BUS serial data output
O SONY BUS serial clock output
I Tuner reception signal detection input
I Wireless remote commander signal input
I CSV control IC serial data input
O CSV control IC serial data output
O CSV control IC serial clock output
O Digital signal processor reset output
I/O Used in conjunction with stereo input/forced monaural output.
O Digital signal processor master mode/slave mode select output
O WIDE/NARROW select output
O WIDE/NARROW select output
— Ground
— Stabilized capacitor connection pin
I RAM backup voltage detection input (Not used in this set.)
O Mute control output of audio output.
O Digital signal processor analog input source select output
— D/A power supply pin (+5 V)
— D/A ground
O Digital signal processor analog input source select output
O LCD contrast alignment output
— D/A, A/D power supply pin (+5 V)
— A/D reference voltage input (+5 V)
— A/D reference voltage input (0 V)
— D/A, A/D ground
I Tuner S-Meter voltage input
I Front panel key input
I Rotary commander key input
I Destination select input
I Destination select input
I Tuner quality voltage input
I Tuner multi pass voltage input
— Power supply pin (+5 V)
Pin Description