Sony cdx-c8050x Service Manual page 21

• IC502 MB90574PMT-G-263-BND (SYSTEM CONTROL) (MAIN BOARD)
Pin No. Pin Name
1 NIL
2 AMSIN
3 AMSON
4 SP LAT
5 ATT
6 SYSRST
7 F/R
8 VCC
9 MTLIN
10 E2PSIO
11 E2PCKO
12 FLS SI
13 FLS SO
14 BUS-ON
15 BEEP
16 NCO
17 UNISI
18 UNISO
19 UNICKO
20 IFWIDTH
21 SWSHIFT
22, 23 NCO
24 SIRCS
25 DSPSI
26 DSPSO
27 DSPCKO
28 DSPPLL
29 DSPMST
30 NCO
31 VOLATT
32 TU ATT
33 VSS
34 C
35 DSPLAT
36 DSPRST
I/O
I Not used (fixed at "L")
Input terminal of whether a music is present or not is detected at auto music sensor
I
"L": music is not present, "H": music is present Not used (fixed at "L")
Tape auto music sensor control ssignal output terminal
O
"L" is output to lower the gain for audio level at FF/REW mode Not used (open)
Serial data latch pulse output for spectrum analyzer section to the liquid crystal
O
display drive controller (IC701)
O Audio line muting on/off control signal output terminal "L": muting on
System reset signal output to the MD mechanism controller (IC501), liquid crystal
O
display drive controller (IC701) and SONY bus interface (IC601) "L": reset
Tape detection signal output terminal "L": reverse side, "H": forward side
O
Not used (open)
— Power supply terminal (+5 V)
I Auto metal detection signal input terminal Not used (fixed at "L")
I/O Two-way data bus for tuner EEPROM with the FM/AM tuner unit (TUX201)
O Tuner EEPROM bus clock signal output to the FM/AM tuner unit (TUX201)
Input terminal at the flash memory data write mode
I Front panel open/close detection signal input terminal
"L" is input when the front panel is closed
Output terminal at the flash memory data write mode
O
Display serial data output to the liquid crystal display driver (IC901)
Bus on/off control signal output to the CD mechanism controller (IC5), liquid crystal
O
display drive controller (IC701) and SONY bus interface (IC601) "L": bus on
O Beep sound drive signal output terminal
O Not used (open)
I Serial data input from the SONY bus interface (IC601)
O Serial data output to the SONY bus interface (IC601)
Serial clock signal output to the CD mechanism controller (IC5), liquid crystal
O
display drive controller (IC701) and SONY bus interface (IC601)
Tuner wide/narrow select signal input terminal "L": wide, "H": narrow
I
Not used (fixed at "L")
When the radio is tuned at the frequency to produce beats, shift the frequency of the
O
signal from the D/D converter so as to produce no beats.
O Not used (open)
I Sircs remote control signal input from the remote control receiver (IC951)
I Serial data input from the CXD2726Q (IC805)
O Serial data output to the CXD2726Q (IC805)
Serial data transfer clock signal output to the CXD2726Q (IC805) and liquid crystal
O
display drive controller (IC701)
PLL clock control signal output to the CXD2726Q (IC805)
O At "L" is output: fixed at "L" is PLCLK (pin ia of IC805 CXD2726Q )
At "H" is output: PLL clock signal output to the PLCLK (pin ia of IC805 CXD2726Q)
Bit clock (BCK) and L/R sampling (LRCK) signal master/slave mode selection signal
O
output to the CXD2726Q (IC805) "L": master mode, "H": slave mode
O Not used (open)
Pre amplifier muting on/off control signal output to the electrical volume (IC301)
O
"L": muting on
O Muting on/off control signal output of the FM/AM tuner signal "L": muting on
— Ground terminal
— Connected to coupling capacitor for the power supply
O Serial data latch pulse output to the CXD2726Q (IC805)
O Reset signal output to the CXD2726Q (IC805) "L": reset
Pin Description
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