Read Sony CMT-HPX9 / HCD-HPX9 Service Manual online
80
HCD-HPX9
• IC Pin Function Description
MAIN BOARD IC306 M3062CMEN-A02FPU0 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
CD DISCSENS 2
I
DISC 4, 5 and DISC (+1) detect signal input
2
CD DISCSENS 1
I
DISC 1 to 3 detect signal input
3
STBY LED
O
LED drive signal output terminal (power)
4
SIRCS IN/WAKE
I
SIRCS signal input terminal
5, 6
VOL A, VOL B
I
Jog dial pulse input terminal (volume)
7
FLSTB
O
Serial data read strobe signal output to the FL/LED driver
8
BYTE
I
External data bus width select signal input terminal (fixed “L”)
9
CNVSS
—
Ground terminal
10
XCIN
I
Sub system clock input terminal (32.768 kHz)
11
XCOUT
O
Sub system clock output terminal (32.768 kHz)
System reset signal input terminal “L”: reset
12
RESET
I
For several hundreds msec. after the power supply rises, “L” is input, then it
changes to “H”
13
XOUT
O
Main system clock output terminal (16 MHz)
14
VSS
—
Ground terminal
15
XIN
I
Main system clock input terminal (16 MHz)
16
VCC
—
Power supply terminal (+3.3V)
17
NMI
I
Non-maskable interrupt signal input terminal Not used
18
RDS-CLK
I
RDS serial data transfer clock signal input terminal (AEP only)
19
CD SCOR
I
Subcode Q data request signal input terminal
20
AC-CUT
I
Power down detection signal input terminal “L”: power down
21
FL CLK
O
Serial data transfer clock signal output to the FL/LED driver
22
CD XRST
O
System reset signal output to the CD servo block
23
CD XLT
O
Latch pulse signal output to the CD servo block
24
CD SENS
I
Internal status (SENSE) input from the CD DSP
25
CD MILP
O
Serial data latch pulse output to the MP3 decoder
26
CD MICS
O
Chip select signal output to the MP3 decoder
27
CD MP3REQ
I
Data transfer request signal input from the MP3 decoder
28
CD MP3STB
O
Standby signal output to the MP3 decoder
29
IICCLK
I/O
IIC data transfer clock signal input and output Not used
30
IICDATA
I/O
IIC two-way data bus Not used
31
NC
O
Not used
32
CD MIACK
I
Acknowledge signal input from the MP3 decoder
33
CD MP3RST
O
Reset signal output to the MP3 decoder
34
CD CLK
O
Serial data transfer clock signal output to the CD DSP
35
CD MIDIO
O
Serial data output to the MP3 decoder
36
CD MIDIN
I
Serial data input from the MP3 decoder
37
CD MICK
O
Serial data transfer clock signal output to the MP3 decoder
38
CD DATA
O
Serial data output to the CD DSP
39
CD AMUTE
O
CD muting on/off control signal output terminal
40
ELV E3/TRE A
I
ELV pulse input from the rotary encoder
41
ELV E2/TRE B
I
ELV dial pulse input from the rotary encoder
42
ELV E1/BASS A
I
ELV dial pulse input from the rotary encoder
43
ELV E0/BASS B
I
ELV dial pulse input from the rotary encoder
44
SW4 (8CM)
I
CD disc size detection (8cm) signal input terminal
45
SW3 (PUSH-CLOSE)
I
CD push-close switch input terminal
46
SW2-1 (CLOSE)
I
CD close switch input terminal
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