47
MDX-CA680/CA680X
•
MAIN BOARD IC501 MN101C49KTJ (US), MN101C49KTK (AEP, UK) (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
VREF–
I
Reference voltage (0V) input terminal (for A/D converter)
2
VSM
I
FM and AM signal meter voltage detection signal input from the FM/AM tuner unit (TU10)
(A/D input)
3
NIL
I
Not used (fixed at “L”)
4
KEYIN1
I
Key input terminal (A/D input) LSW902, LSW905 to LSW911 (LSW910 and LSW911 are AEP,
UK models only), S902 to S905 (MENU, SOUND, ENTER, S SCROLL, D DISPLAY, LIST,
AF, TA,
> M
SEEK +,
. m
SEEK –, DISC/, DISC/PRESET –, )
5
KEYIN0
I
Key input terminal (A/D input) LSW901, LSW903, LSW904, LSW914 to LSW919, S906, S907
(OFF, SOURCE, MODE, 6, 5, 4, 3, 2, 1, D-BASS, MBP)
6
RCIN0
I
Rotary remote commander key input terminal (A/D input)
7
QUALITY
I
Noise level detection signal input at SEEK mode (A/D input)
8
MPTH
I
Multi-path detection signal input from the RDS decoder (IC51) (A/D input)
9
DSTSEL
I
Destination setting terminal (fixed at “L” in this set)
10
VREF+
I
Reference voltage (+5V) input terminal (for A/D converter)
11
VDD
—
Power supply terminal (+5V)
12
OSCOUT
O
Main system clock output terminal (18.432 MHz)
13
OSCIN
I
Main system clock input terminal (18.432 MHz)
14
VSS
—
Ground terminal
15
XIN
I
Sub system clock input terminal (32.768 kHz)
16
XOUT
O
Sub system clock output terminal (32.768 kHz)
17
MMOD
I
Selection signal of memory mode input terminal “L”:single chip mode (fixed at “L”)
18
LCDSO
O
Serial data output to the liquid crystal display driver (IC900)
19
LCDCE
O
Chip enable signal output to the liquid crystal display driver (IC900) “H” active
20
LCDCKO
O
Serial data transfer clock signal output to the liquid crystal display driver (IC900)
21 to 23
NC
O
Not used (open)
24
SYSRST
O
Reset signal output to the SONY bus interface (IC505) “L”: reset
25
BUSON
O
Bus on/off control signal output to the SONY bus interface (IC505) “L”: bus on
26
KEYACK
I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “H”
27
DAVN
I
Synchronized detection signal of RDS data block input from the RDS decoder (IC51)
“H” active (AEP, UK models only)
28
BUIN
I
Battery detection signal input from the SONY bus interface (IC505)
“L” is input at low voltage
29
SIRCS
I
SIRCS remote control signal input from the remote control receiver (IC971)
30, 31
NIL
I
Not used (fixed at “L”)
32
NIH
I
Not used (fixed at “H”)
33
RESET
I
System reset signal input from the reset signal generator (IC602) and RESET switch (S702)
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
34
NOSESW
I
Front panel block remove/attach detection signal input from the nose detection switch (S701)
“L”: front panel is attached
35
BEEP
O
Beep sound drive signal output to the power amplifier (IC611)
36
NCO
O
Not used (open)
37
TEST IN
I
Setting terminal for the test mode “L”: test mode, Normally: fixed at “H”
38
ACC IN
I
Accessory detection signal input “L”: accessory on
39
NCO
O
Not used (open)
40
TELATT
I
Telephone detection signal input terminal At input of “H”, the signal is attenuated by –20 dB
41
NIH
I
Not used (fixed at “H”)
