Sony SMO-D501 Operating instructions

Magneto Optical Disk Drive
SMO-D501
Specification
and Operating instructions
version 1.0
Information in this document is subject to change without notice.

CONTENTS
1. Overview 1
2. Specifications 2
2.1 Drive Specifications 2
2.2 Format Specifications 5
2.2.1 Modulation Code 5
2.2.2 Sector Format 6
2.2.3 Data Field Format 1
1
3. System Configuration 14
3.1 Optical Head 1q
3.2 Laser Diode Drive Block 1e
3.3 Data Separation Block is
3.4 Servo Blocks 16
3.5 Bias Magnet Control Block 1
7
3.6 Loading Block 17
3.7 MPU Block 1
7
3.8 lOP Block 7
3.9 MDA Block 17
4. Setting Up
4.1 Locating the Disk Drive 18
4.2 System Cabling 19
5. Drive Interface Explanation 20
5.1 Physical Interface 20
5.1.1 Electrical Interface 20
5.1.2 Control Signal Drivers and Receivers 20
5.1.3 Data Line Drivers and Receivers 21
5.1.4 Connectors 22
5.2 Signal Lines 23
5.2.1
Pin Assignments 23
5.2.2 Control Out Lines 24
5.2.2.1 DRIVE SELECT 2(0).2(1),2(2) 24
5.2.2.2 WRITE GATE 24
5.2.2.3 READ GATE 25
5.2.2.4 COMMAND DATA 25
5.2.2.5 TRANSFER REQ 25
5.2.2.6 SPIRAL 25
5.2.3 Control In Lines 26

5.2.3.1 DRIVE SELECTED 26
5.2.3.2 READY 26
5.2.3.3 CONFIG/STATUS DATA 26
5.2.3.4 TRANSFER ACK 26
5.2.3.5 ATTENTION 26
5.2.3.6 INDEX 27
5.2.3.7 SECTOR 27
5.2.3.8 COMMAND COMPLETE 27
5.2.4
DATA TRANSFER LINES 28
5.2.4. 1NRZ WRITE DATA 28
5.2.4.2 NRZ READ DATA 28
5.2.4.3 READ/REFERENCE CLOCK 28
5.2.4.4 WRITE CLOCK 28
5.3. COMMANDS AND RESPONSES 28
5.3.1 COMMAND STRUCTURE 28
5.3.2 COMMANDS 29
5.3.3 RESPONSES AND STATUS 30
5.3.4 Seek (0000) 30
5.3.5 RECALIBRATE (0001) 31
5.3.6 REQUEST STATUS (0010) 31
5.3.7 REQUEST CONFIGURATION (0011) 37
5.3.9 CONTROL (0101) 40
5.3.12 INITIATE DIAGNOSTICS (1000) 41
5.3.14 SET HIGH ORDER VALUE (1010) 42
5.3.18 SET CONFIGURATION (1110) 43
5.3.19 Reserved for LINKING (1111) 44
6. Hardware Guide 45
6.1 Front Panel 45
6.1.1 BUSY Indicator 45
6.1.2 EJECT button 45
6.1.3 Emergency Eject Hole 45
6.2 Rear Panel 46
6.2.1
Drive Number Switch 47
6.2.3 ESDI Control Connector (J1
)
48
6.2.4 ESDI Data Connector (J2 )49
6.2.5 ESDI DC Power Connector (J3 )50

Owner's Record
The model and serial numbers are located at the rear of the drive unit. Record these numbers
in the spaces provided below. Refer to them whenever you call upon your Sony dealer
regarding this product.
Model No. Serial No.
WARNING
This equipment generates, uses, and can radiate radio frequency energy and if not installed
and used in accordance with the instructions manual, may cause interference to radio
communications. It has been tested and found to comply with the limits for aClass A
computing device pursuant to Subpart Jof Part 15 of FCC Rules, which are designed to
provide reasonable protection against such interference when operated in acommercial
environment. Operation of this equipment in aresidential area is likely to cause interference in
which case the user at his own expense will be required to take whatever measures may be
required to correct the interference.
CAUTION
Use of controls or adjustments or performance of procedures other than those specified
herein may result in hazardous radiation exposure.
DANGER
Invisible laser
radiation when
open. Avoid direct
exposure to beam.
DANGER
Radiations invisibles du
laser en cas d'ouvenure.
Eviter toute exposition
directs au faisceau.
4-614 -487-02
This label is affixed both on the top cover and front left corner of the inside cartridge tray.

1.Overview
The Sony SMO-D501 is an erasable optical disk drive using a5.25 inch {130mm) magneto-
optical (MO) disk. It can store approximately 650 megabytes (1024 bytes per sector) or 594
megabytes (512 bytes per sector) of data, The SMO-D501 complies with the Continuous-
Composite Format of 130mm Optical Disk starxJard which has been completed at the October
1987 ISO committee meeting. The MO disk is pregrooved and formatted with 1024 bytes per
sector and 17 sedors per track, or 512 bytes per sector and 31 sectors per track, using aspiral
track configuration.
The SMO-D501 achieves adata transfer rate of 7.40 megabits per second using a2400 rpm
rotational speed. The seek time is improved by anewly developed servo system.
The SMO-D501 is connected to the SMO-C501 MO Disk Controller with an M-ESDI (Modified
Enhanced Small Device Interface) which follows the Preliminary ANSI Working Document
X3T9.3/87-005 Revision 2.0.
The SMO-D501 contains the mechanical and optical components, the analog circuitry for the
data separation, servo systems, and the digital circuitry for drive control, formatting and
Interfacing with the disk controller. The use of new digital LSI's has resulted in acompact drive
with ahigh degree of reliability.
Soction 1: Overview 1

2. Soeelftcatlons
The following specifications are defined for the 130 mm magneto optical disk drive SMO-
D501. The recorded format is the Continuous- Composite Format of ISO 130mm Optical Disk
Standards.
2.1 Drive Specifications
The specifications of the SMO-D501 are shown in Table 2.1 and Table 2.2.
2Section 2: Specification

Table 2.1 :SMO-D501 SPECIFICATIONS (1/2)
Item Specification Remarks
Disk 130mm (5.25 inch) Formatted Address ;
double sided MO Disk Track 0Sector 0to
with acartridge Track 18750 Sector 16or 30
Capacity 1M- 10®
Formatted (per disk) 650 Mbytes (1024 bytes/sector)
594 Mbytes (512 bytes/sector)
(per side) 325 Mbytes (1024 bytes/sector)
294 Mbytes (512 bytes/sector)
Unformatted (per side) 433.5 Mbytes (1024 bytes/sector)
433.6 Mbytes (512 bytes/sector)
Disk Format Continuous/Composite ISO standard type A
Rotational Mode CAV CAV; Constant Angular Velocity
Write/Read Side 2Double Sided
Bytes per Sector 1024 or 512
Sectors per Track 17 or 31
Total Tracks per Side 18751
Rotational Speed 2400 rpm CAV
Avaraae Latency 12.5 msec
Seek Time
1Track 1msec Only jumping time
(5 msec) (Including overhead time)
Short Stroke (±64 Tracks) 30 msec Including overhead time
Average 120 msec
Full Stroke 200 msec
Transfer Rate
Data Transfer Rate 7.40 Mbps bps «bits per second
User Data Transfer Rate 680 Kbytes/sec (1024 bytes/sector)
620 Kbytes/sec (512 bytes/sector)
Section 2: Specification 3

Table 2.2 :SMO-D501 SPECIFICATIONS (2/2)
Item Specification Remarks
Mechanical Dimension Not include the connector
Welqht 3Kg
Power Requirements
DC Voltage +5V±5% Ripple voKage < 50 mVpp
+12V±S% Ripple voltage <100 mVpp
DC Current
+5V 1A(max.)
+12V 1A(typ.)
2.5 A(max.) at spinning-up and seeking
Operating Mount Horizontal or Vertical
Mounting Tilt ±5’
Environmental
Operating
Temperature 5-40 ‘C Recommend to use acooling fan
Relative Humidity 10-30% Not condensing
Max. Wet-bulb Temp. 29 “C
Temperature Gradient 10»C/Hour
Non-operating No disk
Temperature -20 -60 “C
Relative Humidity 5-90 %
Laser Diode
Type Semiconductor Laser
(GaAIAs)
Wave Length 790 nm, Continuous
Output Power SOmWmax
Beam Divergence 60* ±1.5*
Vibration
Operating 0.25 G5to 500 Hz Sine Sweep
Non-operating 0.5 G5to 500 Hz Sine Sweep
Shock
Operating 3SG 3msec Half Sine Pulse.
Non-operating 89G 3msec Half Sine Puise
30G 23 msec Trapezoidal Pulse
Laser Product Classification :Class 1(lEC 825)
4Section 2: Specification

2.2 Format Specifications
The Sony SMO-D501 complies with the Continuous-Composite Format of 130mm Optical
Disk Standard which has been completed at the October 1987 ISO committee meeting. Refer
to the standard specifications for details.
R29.0 -30.0 mm Head-in Area
(Formatted with negative addresses)
R30.0 -60.0 mm Data Area
(Formatted with the addresses from Track 0Sector 0to Track
18750 Sector 16)
R60.0 -61 .0 mm Head-out Area
(Formatted with the addresses more than Track 18751)
User data and defect management information are written in the Data Area.
2.2.1 Modulation Code
The SMO-D501 implements (2,7)RLL as the modulation code. The recording method adopts
pit-positfon recording of the (2,7)RLL and the code is decoded by detecting the peak levels in
a read mode.
The (2,7)RLL code is translated as shown in Table 2.5.
Table 2.5 :(2,7)RLL Modulation Code
Input Data (2.7)RLL
10 0100
11 1000
000 000100
010 100100
Oil 001000
0010 00100100
0011 00001000
Section 2: Specification S

2.2.2 Sector Format
The Sector Format is defined in Fig.2.1. and Fig.2.2 The ID field contains the preformatted
triple ID'S and the Data field contains 1024 bytes or 512 bytesof user data.
Each signal in the format is defined as follows:
SM (Sector Mark): 5byte length to identify asector header.
{pattern] 5337333350010010010
~II I
mark bit length channel coding bit
VFO (Variable Frequency Oscillator Signals): 12 or 8byte length to synchronize the
PLO (Phase locked oscillator) with the read out signal.
[pattern]
VF01: 01001001001001 -—010 0 10
VFO 2: 10010010010010 -—010010
00010010010010 010010
VFO 3: 01001001001001 010010
AM (Address Mark): 1byte length to detect ID fields.
[pattern] 0100100000000100
6Section 2: Specification

iO (Idsntlflcation) *CRC (Cyclic Redundancy Check Code); The ID consists of 2
bytes of atrack address and 1byte of asector address as follows. The MSB (most significant
bit) of the track address is output first.
2bytes 1byte 2bytes
MSB LSB b7 bO
Track Address Sector Address CRC
b0-b4 :Sector Address (0-16,31)
bS: 0(Reserved)
b6, b7: ID number (iD0-ID2)
2byte CRC codes are for detecting ID failure. The codes are generated using the
CCITT polynominal x''®-i-x‘'2+x5+i with the registers seeded to all I's.
PA (Post Amble): 1byte to altow the last byte of CRC to achieve closure of afew uncertain
bits in the (2,7)RLL encoding scheme.
ODF (Offset Detection Flag): 1byte of mirror area with no groove or no preformatted
data.
FLAG: 5bytes of the flag area to prevent inadvertent write operations over previously written
data. The SMO-D501 does not used this area because of rewritable operation.
ALPC (Automatic Laser Power Control): This area is designated as atest area for
calibration of the laser power levels.
GAP: 3bytes length to absorb the timing shift when writing aFLAG.
SYNC (Synchronization): 12 bytes length to give the data separation timing for the
succeeding DATA field.
(pattern]
010000100100001000100010010001001000001001001000
section 2: Specification 7

DATA FIELD: For 1024 bytes/sectof format, the data field consists of 1024 bytes of user
data, and 164 bytes of CRC/ECC data, plus 12bytes of control information.
For 51 2bytes/sector format, the data field consists of 51 2bytes of user data, 84
bytes of CRC/ECC data, and 2bytes of reserved data, plus 12 bytes of control
information.
RESYNC (Resynchronization Mark): The purpose of the RESYNC marks is to prevent
the loss of byte synchronization when the VFO must ride through defects within a data field
and to limit the propagation of errors. The RESYNC consists of 1byte pattern (16 channel
code bits) of irregular (2.7)RLL modulation code.
[pattern] 0010000000100100
BUFFER: The BUFFER consists of atotal of 20 bytes of reserved space for motor speed
tolerances and other electrical/mechanical tolerances.
8Soclion 2: Spacification

of
1024
Bytes/Sector
to

2.2.3 Data Field Format
For 1024 bytes/sector format, the data field consists of 1024 bytes of user data, 12 bytes of
control information, 4bytes of CRC data, 160 bytes of EDAC (Error Detection and Correctton)
data and 59 bytes of RESYNC pattern. The data configuration is shown in Fig.2.3. The 10
way interleave is adopted in the configuration for increasing the error correction capability.
For 512 bytes/sector format, the data field consists of 512 bytes of user data, 12 bytes of
control information, 4bytes of CRC data, 80 bytes of EDAC (Error Detection and Correction)
data, 2bytes of reserved data and 40 bytes of RESYNC pattern. The data configuration is
shown in Fig.2.4. The 5way interleave is adopted in the configuration for increasing the error
correction capability.
The EDAC method is the Reed-Solomon code known as Long Distance Code (LDC), with a
degree of redundancy of 16. The ECC (Error Conection Code) polynomial expression is as
follows.
Primitive Polynomial: Gp(X) »x^+x^+x^+x^+i
Element: Alpha* (Beta*)®®
Bata: the root of Gp(x)
Generator Polynomial: G(x) «{x+Alpha''2®)(x+Alpha^2'') ••• (x+Alpha''®®)
Initial set value is all 1's. ECC data output to the media is inverted from that calculated.
The 4byte CRC is calculated over the data field including the control data. The same primitive
polynomial as the ECC is used. The CRC generator polynomial is as follows.
G(X) «(x+Alpha'’®®)(x+Alpha'’®^) -(x+AIpha"’®®)
Initial set value is all O's. Input sequence is MSB to LS8. Output value to the media is
not inverted from that calculated.
1
1
Soction 2: Specification

SYNC DO D1 D2 03 D4 D5 06 07 D8 09
010 011 012 013 014
R/WDirection
User Data D0-D1023
II
li
CDS
P0,0 P1.0 P2,0
P0,1
023COQ cot
coil
P2.15 sP4,15 P7,15 P8,15
On User Data (1024 Bytes)
BResync Byte (Every 20 Bytes)
Cbn Control Data
Pn,m Parity (Reed -Solomon Code Data)
Flg.2.3 1024 Bytes/Sector Data Block Configuration
Soction 2: Specification

DO D1 D2 D3 D4
D5 06 D7 D8 D9
gD15 R/WDirection
D20 User Data
D0-D511
D510 D511 CDO C01 C02
CD3 C04 CD5 COS C07
CDS CD9 CDtO CD 11 FF'
•FF- CRC
P0,0 P1.0 P2,0 P3,0 P4,0
ECC
Note: Hex value ’FF"
written in 2bytes.
^=>0,14 PI. 14 P2, 14 =3,14P4,14
>
P0.15 PI, 15 P2,15 =3,15 P4,15
IITV
^User Data (51 2Bytes)
Resync Byte (Every 15Bytes)
Control Data
Pn.m Parity (Reed -Solomon Code Data)
Fig 2.4 512 Bytes/Sector Data Block Configuration
Section 2: Specification 13

3. System ConflQuratlon
The SMO-0501 MO Disk Drive consists of several mechanical blocks, an optical block, and
electrical blocks. The electrical blocks contain all of the an analog and digital circuitry for the
drive functions. The analog circuitry includes laser diode drive, RF block and the servo
systems for focusing and tracking. The digital circuitry includes analog/mechanism control
logic, modulator/demodulator and drive interface (modified ESDI) logic. The block diagram of
the SMO-D501 drive is shown in Fig.3.1.
14Section 3: System Configuration

Saction
3:
System
Configuration

3.1
Optical Head
Erasing, writing and reading are performed by alaser diode and photo detectors in the optical
head. The laser diode driver and RF/servo pre-amplifiers are built in tWs optical head.
3.2 Laser Diode Drive Block
This block drives the laser diode at the correct power in each mode for reading, writing and
erasing using an Automatic Power Control (APC) circuit. The APC is performed by measuring
the writing and erasing power at the ALPC area in the recording format and holding the level.
3.3 Data Separation Block
The read-out signal from the photo-delectors is divided into two different band-width signals
for data separation and servo systems. The RF signal is amplified, equalized and
differentiated for peak detection of data. The PLO (Phase-Locked Oscillator) generates the
phase-locked clock iri order to separate the data correctly. The demodulator decodes the
(2,7) RLL in accordance with this PLO clock.
3.4 Servo Blocks
The SMO-D501 contains the following four servo blocks.
(1) Spindle Servo
(2) Focus Servo
(3) Tracking Servo
(4) Slide Servo
The Spindle Servo block rotates the MO disk at aconstant 2400rpm by adigital frequency-
lock servo method using the Frequency Generator (FG) signal.
The Focus Servo block controls atwo-axis actuator to focus the laser diode beam on the disk
writing surface by an astigmatism focus servo method.
The Tracking Servo block controls atwo-axis actuator to follow the track by aDPP (Differential
Push-Pull) servo method.
16Section 3: System Configuration