Sony CDX-R3350 Service Manual page 29

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• IC PIN DESCRIPTIONS
• IC3 MB90487APFV-G-142-BNDE1 (CD SYSTEM CONTROL) (SERVO BOARD (2/2))
Pin No.
1
2 to 6
7
8
9
10
11
12
13
14
15
16 to 20
21
22 DAC ZDETL
23 DAC ZDETR
24
25
26
27 DEC SSTBY
28, 29
30
31, 32
TE
L 13942296513
33
34
35
36
37 DEC XMUTE
38, 39
40
41
42 MEC LIMIT
43 MEC LOAD
44 MEC EJECT
45 MEC INSW
46
47, 48
49
50
51
52
53 MEC SELFSW
54, 55
56
57
58
www
59
60
61
.
62
63
64
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Pin Name I/O
NC O Servo 1.5 V power supply control signal output
NC — Not used. (Open)
CD BUS0 I/O Bus data signal input/output 0
CD BUS1 I/O Bus data signal input/output 1
VSS — Ground pin
CD BUS2 I/O Bus data signal input/output 2
CD BUS3 I/O Bus data signal input/output 3
CD BUCK O Bus clock signal output
CD XCCE O Chip enable signal output
CD XRST O Reset signal output
CD ZDET I Zero detection signal input
NC — Not used. (Open)
VCC — Power supply pin (+3.3 V)
I Zero data detection signal input (L-ch)
I Zero data detection signal input (R-ch)
NC — Not used. (Open)
RXD I UART RXD data signal input (MCBUS/Flash data input)
TXD O UART TXD data signal output (MCBUS/Flash data output)
O SRAM STANDBY mode control signal output
NC — Not used. (Open)
DEC INT I Request signal input
NC — Not used. (Open)
AVCC — Power supply pin (+3.3 V) for A/D converter
AVRH — External reference voltage for A/D converter
AVSS — Ground pin
NC — Not used. (Open)
O Mute signal output L: mute
NC — Not used. (Open)
VSS — Ground pin
NC — Not used. (Open)
I Sled limit in detection switch signal input
O Loading motor signal output (Load direction)
O Loading motor signal output (Eject direction)
I Pack-in detection signal input
MEC DSW I Chucking end detection switch signal input
MD0, MD1 I CPU operation mode designation signal input (Connect to Vcc.)
MD2 I CPU operation mode designation signal input (Connect to Vss.)
BUS ON I Bus on signal input L: bus on
BU IN I Backup on/off signal input H: backup on, L: backup off
CD SBSY I SUBQ sync signal input L: interruption
I Disc insert detection switch signal input L: disc in interruption
NC — Not used. (Open)
UNISI I Serial data signal input
UNISO O Serial data signal output
UNICKI I Serial clock signal input
LINEOFF O Line off signal output
x ao
A ATT O Audio attenuation signal output H: ATT on
y
EJECT OK I Front panel open signal input H: eject
i
OPEN REQ O Front panel open/close request signal output H: open request
MECON O Mechanism deck power supply control signal output
CDON O Servo power supply control signal output
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CDX-R3350/R3350C
2 9 9 4 2 8
Pin Description
1 5 0 5 8 2 9 9 4
m
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9 9
2 8 9 9
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