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MAIN BOARD IC502 (MASTER CONTROLLER)
MB90574BPMT-G-263-BND (MDX-C8500X)
Pin No.
Pin Name
1
NC
2
AMSIN
3
AMSON
4
SA LAT
5
ATT
6
SYSRST
7
F/R
8
VCC
9
MTLIN
10
T.ROM-SDA
T.ROM-SCL
11
12
RX
13
TX
14
BUS-ON
15
BEEP
16
NC
17
UNISI
18
UNISO
19
UNICKO
20
IF-BW
21
SW SHIFT
22, 23
NC
24
SIRCS
25
DSPSI
26
DSPSO
27
DSPCKO
28
DSPPLL
29
DSPMST
30
NC
31
VOLATT
32
TUMUTE
33
VSS
34
C
MB90574BPMT-G-264-BND (MDX-C8500R)
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 signal 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 display drive
O
controller (IC701)
O
Audio line muting on/off control signal output terminal "H": muting on
System reset signal output to the MD mechanism controller (IC501), liquid crystal display drive
O
controller (IC701) and SONY bus interface (IC601) "L": reset
O
Tape detection signal output terminal "L": reverse side, "H": forward side Not used (open)
—
Power supply terminal (+5V)
I
Auto metal detection signal input terminal
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 MD mechanism controller (IC501), liquid crystal display
O
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 MD mechanism controller (IC501), liquid crystal display drive
O
controller (IC701) and SONY bus interface (IC601)
Tuner wide/narrow select signal input terminal "L": wide, "H": narrow
I
Not used (fixed at "L")
O
Not used
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 display drive
O
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 output to
O
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 Not used (open)
Description
Not used (fixed at "L")
53
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