Diagrams; Explanation Of Ic Terminals - Sony MZ-R50 - MD Walkman MiniDisc Recorder Service Manual

6-1. EXPLANATION OF IC TERMINALS

IC503 DIGITAL SERVO, ATRAC (CXD2652AR)
Pin No. Pin name
1 MNT 0
2 MNT 1
3 MNT 2
4 MNT 3
5 SWDT
6 SCLK
7 XLAT
8 SRDT
9 SENS
10 XRST
11 SQSY
12 DQSY
13 WRPWR
14 NC
15 TX
16 OSC1
17 OSC0
18 XTSL
19 NC
20 RV
SS
21 DIN
22 NC
23 ADDT
24 DATA
25 ALRCK
26 ABCK
27 FS256
28 DV
DD
29 – 39 A00 – A08, A10, A11
40 DV
SS
41 XOE
42 XCAS
43 A09
44 XRAS
45 XWE
46 – 49 D0 – D3
50 MVCI
51 ASYO
52 ASYI
53 AV
DD
54 BIAS
55 RFI
SECTION 6

DIAGRAMS

I/O
O Traverse count signal output.
O Track jump detect output.
– Not used (Open).
– Not used (Open).
I Inputs write data signal from system controller (IC801).
I Inputs serial clock signal from system controller (IC801).
I Inputs serial latch signal from system controller (IC801).
O Outputs write data signal to system controller (IC801).
O Outputs internal status (SENSE) to system controller (IC801).
I Inputs reset signal from system controller (IC801). Reset : L
Output subcode Q sync (SCOR) to system controller (IC801).
O
Outputs "L" every 13.3msec. Outputs "H" at all most mostly.
Outputs digital-in U-bit CD format subcode Q sync (SCOR) to system controller (IC801).
O
Outputs "L" every 13.3msec. Outputs "H" at all most mostly.
I Inputs laser power switching signal from system controller (IC801).
– Not used (Open).
Input of write data taransmission timing from system controller (IC801).
I
Also used as magnetic field head ON/OFF output.
O Clock output (22.5MHz).
I Clock input (22.5MHz).
– Not used (Fixed at "L")
– Not used (Ground).
– Connect to ground.
I Digital audio signal input pin (For optical input).
– Not used (Open).
I Audio data input from A/D converter (IC303).
O Monitor/decode audio data output to A/D converter (IC303).
O L/R clock output to D/A converter (IC303).
O Bit clock signal output to A/D, D/A converter (IC303).
O 11.2896MHz clock output (MCLK).
– Power supply (+2.8V) for digital.
O Address signal output to RAM (IC509).
– Ground terminal.
O Output enable contol signal output to RAM (IC509).
O Column address strobe singal output to RAM (IC509).
O Address signal output to RAM (IC509).
O Row address strobe signal output to RAM (IC509).
O Read/write control signal output to RAM (IC509).
I Data signal input from RAM (IC509).
– Not used (Connect to ground).
O Playback EFM full-swing output (L : VSS, H : VDD).
I Playback EFM asymmetry comparate voltage input.
– Power supply (+2.8V) for analog.
I Playback EFM asymmetry circuit constant current input.
I Inputs playback EFM RF signal from RF amplifier (IC501).
– 35 –
Description