Read Sony CDX-MP50 Service Manual online
15
CDX-MP50
• IC5 CXD9684R-005 (DSP) (SERVO BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
/RESET
I
Reset input pin “L”: reset
2
MIMD
I
Microcomputer interface mode selection input “H”: I2C, “L”: TSB
3, 4
AD0, AD1
O
External SRAM address signal output
5
MIDIO (I2C_SDA)
I/O
Serial data input/output
6
MICK (I2C_SCL)
I
Serial clock input
7
AD2
O
External SRAM address signal output
8
VDDT (3.3V)
—
Power supply (3.3 V) for digital circuit
9
SDO
O
Data output
10, 11
AD3, AD4
O
External SRAM address signal output
12
SDI0
I
Data input 0
13
BCKIA
I
Bit clock input A
14
LRCKIA
I
LR clock input A
15
AD5
O
External SRAM address signal output
16
CE
O
External SRAM chip enable signal output
17
OE
O
External SRAM output enable signal output
18
VDD (2.5V)
—
Power supply pin (2.5 V) for digital circuit
19
STANDBY
I
Standby mode control signal input “H”: STB, “L”: normal
20
VSS (2.5VGND)
—
Ground pin for digital circuit
21
VSSL (2.5VGND)
—
Ground pin for DAC Lch
22
VRAL
—
Reference voltage pin for DAC Lch
23
LO
O
DAC Lch signal output (Open)
24
VDAL (2.5V)
—
Power supply pin (2.5 V) for DAC Lch
25
VDAR (2.5V)
—
Power supply pin (2.5 V) for DAC Rch
26
RO
O
DAC Rch signal output (Open)
27
VRAR
—
Reference voltage pin for DAC Rch
28
VSSR (2.5VGND)
—
Ground pin for DAC Rch
29
TESTP
I
Pin for test “H”: test mode, “L”: normal (fixed at “L”)
30
CKS
I
VCO selection input “H”: VCO, “L”: X1 input
31 – 34
AD12 to AD9
O
External SRAM address signal output
35
VDDT (3.3V)
—
Power supply pin (3.3 V) for digital circuit
36 – 38
AD8 to AD6
O
External SRAM address signal output
39
REQ
O
Interrupt request signal output to the CD master control
40
VSS
—
Ground pin for digital circuit
41, 42
AD13, AD14
O
External SRAM address signal output
43
WR
O
External SRAM write signal output
44, 45
AD16, AD15
O
External SRAM address signal output
46, 47
IO0, IO1
I/O
External SRAM data input/output
48
VSS
—
Ground pin for digital circuit
49 – 51
IO2 to IO4
I/O
External SRAM data input/output
52
VDD (2.5V)
—
Power supply pin (2.5 V) for digital circuit
53 – 55
IO5 to IO7
I/O
External SRAM data input/output
56
VSSP
—
Ground pin for VCO circuit
57
PDO
O
PLL phase error detection signal output
58
VCOI
I
VCO control voltage input
59
VDDP
—
Power supply pin for VCO circuit
60
XRDE
I/O
External clock input, audio clock output Not used. (Open)
61
VDDX (2.5V)
—
Power supply pin for oscillation circuit
62
XI
I
Resonator pin
63
XO
O
Resonator pin
64
VSSX
—
Ground pin for oscillation circuit
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