USB 3.5" Micro Floppy Disk Drive Features Introduction This material provides the information necessary to interface the X1 series micro floppy disk drives to floppy disk controllers, and provides all the information usually needed to integrate the X1 series of disk drives into a computer system. 2 /1.6 /1 MB Compact size - 12.7mm H x 96mm W x 130mm D Single power operation - 4.5 ~ 5.5 V Light Weight - 158g USB Interface Low Power Consumption - 1.1 W(read), 0.015 W (standby) High Vibration Resistance - (0.5 G) (5-500 Hz) Operate, (4.5 G) (5-500 Hz) Standby Applications Portable or Desktop Computers Made by Citizen Watch Co., Ltd. Tokyo, Japan Page 1 3.99 Version 1.0
Specifications Summary 1. Performance Specifications 1MB mode 1.6MB mode 2MB mode Capacity (Kbytes) Unformatted Per Disk 1000 1604 2000 Per Surface 500 802 1000 Per Track 6.25 10.025 12.5 Formatted Per Disk 256B / Sector 655.2 (16) 1025 (26) 1311 (32) 512B / Sector 737.2 (9) 1183 (15) 1475 (18) 1024B / Sector 819.2 (5) 1311 (8) 1638 (10) Transfer Rate (Kbit / sec) 250 500 500 Average Latency (msec) 100 83 100 Access Time (msec) Track to Track Without Setting 3 3 3 Average With Setting 94 94 94 Setting Time (msec) 15 15 15 Motor Start Time (sec) 0.5 0.5 0.5 2. Functional Specifications 1MB mode 1.6MB mode 2MB mode Rotational Speed (r.p.m.) 300 360 300 Recording Density (BPI) 8717 14184 17434 Track Density (TPI) 135 135 135 Tracks 160 160 160 Encoding Methode MFM MFM MFM Page 2 3.99 Version 1.0
3. Physical Specifications Environmental Limits Operating Shipping Storage Ambient Temperature 5 C to 45 C -40 C to 60 C -20 C to 50 C Relative Humidity 20 to 80% 8 to 90% 8 to 80% Maximum Wet Bulb 85 F (29.4 C) no condensation no condensation DC Voltage Requirement +4.5 V to +5.5 V DC Power Current Motor start ( 5 V ) 510 ma typ. Read 200 ma typ. Write 200 ma typ. Seek ( 5 V ) 500 ma typ. Stand by 3 ma typ. Mechanical Dimensions Height 0.5 inch (12.7mm) Width 3.8 inch (96 mm) Depth 5.13 inch (130 mm) without panel Weight 0.33 lb (158 g) Shock Operating 10Gs with duration of 11 msec ( No hard error ) 3Gs with duration of 11 msec ( No soft error ) Non-Operating 100Gs with duration of 11 msec Vibration Operating Non-Operating Frequency Displacement Acceleration 5-20 Hz 0.01 inch 20-500 Hz *0.5G 5-20 Hz 0.12 inch 20-500 Hz 4.5G * Except reasonant frequency Page 3 3.99 Version 1.0
4. Reliability Specifications MTBF 10,000 power on hours under typical usage MTTR 30 minutes Life 5 years Error Rates 9 Soft Read Error 1 per 10 bits read 12 Hard Read Error 1 per 10 bits read 6 Seek Error 1 per 10 seeks Media Life Passes per Track 3.0 x 10 6 Insertions 30,000+ times Electrical Interface 1. Block Diagram USB Connector Head Media SYSTEM PCB Stepping Motor FDD PCB Fig 1 Block Diagram Spindle Motor 2. USB Specification The drive has following specification. Method USB specification Rev. 1.0 Transfer Rate Full Speed ( 12Mbps ) Signal Level Meet USB specification ( >200 mv ) OS Windows 98 Fig 2 USB Specification Page 4 3.99 Version 1.0
7. Power Interface 1) Power Supply Specifications Power supply and current are shown in below Figure and Table. POWER CONSUMPTION MOTOR ON SEEK READ WRITE STANDBY FIG 3 Power Consumption Diagram Table 5 Power Supply Current MODE SPINDER MOTOR SEEK READ WRITE STANBY ON (PEEK) TIME (ms) 20ms 15ms - - - PEAK TYPICAL 510mA 500mA 200mA 200mA 3.0mA Vcc=5V Physical Interface 1. Cable Connections The electrical interface between this drive and the host system via USB connector. USB Connector USB Drive Cable : 50 cm max. Fig 4 Connectors Page 5 3.99 Version 1.0
Mechanical Dimension 2~M2.6 USB-1/F CONNECTOR 2.5±0.15 Shield Cover 2.5±0.15 29.38 21±0.2 4±0.1 21±0.2 90±0.2 130±0.3 90±0.2 12.7±0.2 2 LED 26.1±0.2 96 +0.1-0.2 32.5±0.2 11±0.2 Front Shutter Eject Button Page 6 3.99 Version 1.0 4.1 Media Opening
Recording Format 1. Recommended Format The format of the data recorded on the disk is totally a function of the host system, and can be designed around the user's application to take best advantage of the total available bits that can be written on any track. The following tables and figures shows the typical record formats. Table 7 Recommended 1 MB Format FM/MFM IBM Format ISO Format 128/256 bytes/sector 15 sectors (FM) 16 sector 16 sectors (MFM) 256/512 bytes/sector 9 sectors 9 sectors 512/1024 bytes/sector 4 sectors 5 sectors Table 8 Recommended 1.6 MB Format FM/MFM IBM Format 128/256 bytes/sector 26 sectors 256/512 bytes/sector 15 sectors 512/1024 bytes/sector 8 sectors Table 9 Recommended 2 MB Format FM/MFM IBM Format 128/256 bytes/sector 32 sectors 256/512 bytes/sector 18 sectors 512/1024 bytes/sector 10 sectors Page 7 3.99 Version 1.0
ID FIELD SECTOR 1 DATA FIELD GAP3 GAP4b GAP4a SYNC INDEX GAP1 SYNC ID ADD C H R N CRC GAP2 SYNC DATA DATA CRC GAP3 SYNC GAP4b MARK MARK 1 2 MARK 1 2 SINGLE BYTE (10) 40 6 1 26 6 1 4 2 11 6 1 2 6 DENSITY DATA(16) FF 00 FC* FF 00 FE* FF 00 FB* DATA FF 00 FF DOUBLE BYTE(10) 80 12 3 1 50 12 3 1 4 2 22 12 3 1 2 12 DENSITY DATA(16) 4E 00 *C2 FC 4E 00 *A1 FE 4E 00 *A1 FB DATA 4E 00 4E PREAMBLE SECTOR SINGLE DOUBLE 128 73 188 27 232 15 256 73 331 42 73 9 512 73 603 58 540 4 256 146 372 54 152 15 512 146 658 84 182 9 1024 146 1202 116 1296 4 DATA GAP3 GAP4 SECTOR/ TRACK SINGLE DENSITY DOUBLE DENSITY DATA CLOCK DATA CLOCK INDEX ADDRESS MARK FC D7 FC, F1 14,01 ID ADDRESS MARK FE C7 A1, FE 0A, 00 DATA ADDRESS MARK F8 C7 A1, F8 0A, 00 SELECTED DATA ADDRESS MARK F8 C7 A1, F8 0A, 03 GAP FF FF 4E 90 SYNC 00 FF 00 FF INDEX MARK - - C2 14 ADDRESS MARK - - A1 0A Fig 7 1.0MB IBM Format SECTOR 1 ID FIELD DATA FIELD GAP3 GAP4 GAP1 SYNC ID ADD C H R N CRC GAP2 SYNC DATA DATA CRC GAP3 SYNC GAP4b MARK 1 2 MARK 1 2 SINGLE BYTE (10) 16 6 1 4 2 11 6 1 2 6 DENSITY DATA(16) FF 00 FE* FF 00 FB* DATA FF 00 FF DOUBLE BYTE(10) 32 12 3 1 4 2 22 12 3 1 2 12 DENSITY DATA(16) 4E 00 *A1 FE 4E 00 *A1 FB DATA 4E 00 4E PREAMBLE SECTOR SINGLE 128 16 188 27 101 15 256 16 331 42 130 9 512 16 603 58 94 5 DOUBLE 256 32 372 54 266 15 512 32 658 84 296 9 1024 32 1202 116 208 5 DATA GAP3 GAP4 SECTOR/ TRACK Fig 8 1.0MB ISO Format Page 8 3.99 Version 1.0
ID FIELD SECTOR 1 DATA FIELD GAP3 GAP4b GAP4a SYNC INDEX GAP1 SYNC ID ADD C H R N CRC GAP2 SYNC DATA DATA CRC GAP3 SYNC GAP4b MARK MARK 1 2 MARK 1 2 SINGLE BYTE (10) 40 6 1 26 6 1 4 2 11 6 1 2 6 DENSITY DATA(16) FF 00 FC* FF 00 FE* FF 00 FB* DATA FF 00 FF DOUBLE BYTE(10) 80 12 3 1 50 12 3 1 4 2 22 12 3 1 2 12 DENSITY DATA(16) 4E 00 *C2 FC 4E 00 *A1 FE 4E 00 *A1 FB DATA 4E 00 4E PREAMBLE SECTOR SINGLE DOUBLE 128 73 188 27 247 26 256 73 331 42 170 15 512 73 603 58 311 8 256 146 372 54 598 26 512 146 658 44 100 15 1024 146 1202 116 654 8 DATA GAP3 GAP4 SECTOR/ TRACK SINGLE DENSITY DOUBLE DENSITY DATA CLOCK DATA CLOCK INDEX ADDRESS MARK FC D7 FC, F1 14,01 ID ADDRESS MARK FE C7 A1, FE 0A, 00 DATA ADDRESS MARK F8 C7 A1, F8 0A, 00 SELECTED DATA ADDRESS MARK F8 C7 A1, F8 0A, 03 GAP FF FF 4E 90 SYNC 00 FF 00 FF Fig 9 1.6MB IBM Format ID FIELD SECTOR 1 DATA FIELD GAP3 GAP4b GAP4a SYNC INDEX GAP1 SYNC ID ADD C H R N CRC GAP2 SYNC DATA DATA CRC GAP3 SYNC GAP4b MARK MARK 1 2 MARK 1 2 SINGLE BYTE (10) 40 6 1 26 6 1 4 2 11 6 1 2 6 DENSITY DATA(16) FF 00 FC* FF 00 FE* FF 00 FB* DATA FF 00 FF DOUBLE BYTE(10) 80 12 3 1 50 12 3 1 4 2 22 12 3 1 2 12 DENSITY DATA(16) 4E 00 *C2 FC 4E 00 *A1 FE 4E 00 *A1 FB DATA 4E 00 4E PREAMBLE SECTOR SINGLE DOUBLE 128 73 188 27 161 32 256 73 331 42 219 18 512 73 603 58 147 10 256 146 372 54 450 32 512 146 658 84 510 18 1024 146 1202 116 334 10 DATA GAP3 GAP4 SECTOR/ TRACK SINGLE DENSITY DOUBLE DENSITY DATA CLOCK DATA CLOCK INDEX ADDRESS MARK FC D7 FC, F1 14,01 ID ADDRESS MARK FE C7 A1, FE 0A, 00 DATA ADDRESS MARK F8 C7 A1, F8 0A, 00 SELECTED DATA ADDRESS MARK F8 C7 A1, F8 0A, 03 GAP FF FF 4E 90 SYNC 00 FF 00 FF Page 9 Fig 10 2.0MB IBM Format 3.99 Version 1.0