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ST3655 Family:
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ST3390A, ST3550A, ST3655A
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AT Interface Drives
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Product Manual
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Related Manuals for Seagate ST3655 Series
Summary of Contents for Seagate ST3655 Series
- Page 1 ......... . ST3655 Family: .
- Page 3 ......... . ST3655 Family: .
- Page 4 , Seagate Technology ® and the Seagate logo are registered trademarks of Seagate Technology, Inc. Other product names are trade- marks or registered trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any...
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Page 5: Table Of Contents
ST3655 Family AT Drives Product Manual, Rev. A Contents 1.0 Specifications ......1 1.1 Formatted capacity ..... . 1 1.1.1 Recommended logical configuration . - Page 6 ST3655 Family AT Drives Product Manual, Rev. A 1.12 Agency listings ..... . . 11 1.13 FCC verification ..... . 11 2.0 Configuring and mounting the drive .
- Page 7 ST3655 Family AT Drives Product Manual, Rev. A Figures Figure 1. Typical startup current profile ....10 Figure 2. AT interface connector ....14 Figure 3.
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Page 9: Specifications
ST3655 Family AT Drives Product Manual, Rev. A 1.0 Specifications 1.1 Formatted capacity The drive is low-level formatted at the factory. You cannot low-level format the drive. ST3390A ST3550A ST3655A Formatted capacity (Mbytes*) 341.311 452.415 528.482 Total sectors 666,624 883,624 1,032,192 * One megabyte equals one million bytes. -
Page 10: Physical Organization
ST3655 Family AT Drives Product Manual, Rev. A 1.1.2 Physical organization ST3390A ST3550A ST3655A Read/write heads Servo heads Discs 1.2 Functional specifications Interface Zone Bit Recording method RLL (1,7) External data burst transfer rate 11.1* (Mbytes per sec) Internal data transfer rate 21.6 to 36.56 (Mbits per sec) 4,500 ±... -
Page 11: Thermal Compensation
ST3655 Family AT Drives Product Manual, Rev. A Track-to-track Average Full-stroke seek Average seek time seek time time latency 3.5 msec typ 12.0 msec typ 30.0 msec typ 6.67 msec 4.0 msec max 14.0 msec max 32.0 msec max Note. Host overhead varies between systems and cannot be specified. Drive internal overhead is measured by issuing a no-motion seek. -
Page 12: Start/Stop Time
ST3655 Family AT Drives Product Manual, Rev. A 1.4 Start/stop time Within 20 seconds after DC power is applied, the drive is ready. Within 15 seconds after DC power is removed, the drive spindle stops rotating. 1.5 Typical power-up and power-down sequence The typical power-up and power-down sequences assist you in evaluat- ing the drive’s performance;... -
Page 13: Reliability
ST3655 Family AT Drives Product Manual, Rev. A 1.6 Reliability Read error rates are measured with automatic retries and data correction with ECC enabled and all flaws re-allocated. The mean time between failures (MTBF) is measured at nominal power at sea level and an ambient temperature of 40 °... -
Page 14: Relative Humidity
ST3655 Family AT Drives Product Manual, Rev. A 1.8.4 Relative humidity Operating 8% to 80% noncondensing Maximum wet bulb 26 ° C (79 ° F) Maximum operating 10% per hour gradient Nonoperating 5% to 95% noncondensing Maximum wet bulb 26 ° C (79 ° F) 1.9 Acoustics Sound pressure is measured from 1 meter above the drive top cover at idle. -
Page 15: Dc Power
You can customize the power-management modes using the AT inter- face commands that control the power modes. These commands are described in the Seagate ATA Interface Reference Manual , publication number 36111- xxx . Note. If you install one of these power-management drives as a slave to... -
Page 16: Power-Management Modes
Standby mode. To set the idle and standby timers, refer to the Idle command in t he Seagate ATA Interface Reference Manual , publication num- ber 36111- xxx . In both the Idle and Standby modes, the drive accepts all commands and returns to the Seeking or Read/write modes any time disc access is necessary. -
Page 17: Power Consumption
ST3655 Family AT Drives Product Manual, Rev. A 1.11.5 Power consumption In the table below, the values apply at the drive power connector. Current was measured with an RMS DC ammeter. Read/ Spinup Seeking write Idle Standby Current at +12V Amps peak 1.90 —... -
Page 18: Figure 1. Typical Startup Current Profile
ST3655 Family AT Drives Product Manual, Rev. A The startup current profile of each drive is unique. A typical startup current profile is shown in Figure 1. amps Seconds Figure 1. Typical startup current profile Power is applied to the drive. After a delay, the startup current is applied and the spindle begins to turn. -
Page 19: Agency Listings
Federal Communications Commission authorization, verification or cer- tification of the device is required. Seagate Technology, Inc. has tested these drives in an enclosure as described above to ensure that the total assembly (enclosure, disc drive, motherboard, power supply, etc.) does comply with the limits for a Class B computing device, pursuant to Subpart J of Part 15 of the FCC rules. - Page 20 ST3655 Family AT Drives Product Manual, Rev. A If necessary, you should consult your dealer or an experienced radio/tele- vision technician for additional suggestions. You may find helpful the following booklet prepared by the Federal Communications Commission: How to Identify and Resolve Radio-Television Interference Problems. This booklet is available from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402.
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Page 21: Configuring And Mounting The Drive
ST3655 Family AT Drives Product Manual, Rev. A 2.0 Configuring and mounting the drive This section contains the specifications and instructions for configuring and mounting the drive. 2.1 Handling and static-discharge precautions After you unpack the drive, and before you install it in a system, be careful not to damage it through mishandling. -
Page 22: I/O Cable And Connector
ST3655 Family AT Drives Product Manual, Rev. A 2.2 I/O cable and connector The I/O connector is a 40-pin connector. The even pins are next to the edge of the printed circuit board; the odd pins are away from the printed circuit board. -
Page 23: Remote Led Connection
These options are described in more detail in Sections 2.5 and 2.6. 2.4.1 Jumper sizes The jumper blocks use 0.1-inch configuration jumpers. Use Seagate part number 10562-001 or an equivalent. Caution. If you try to install a jumper that is not the correct size, you could damage the jumper and the jumper block pins. -
Page 24: Figure 3. Configuration Jumpers
ST3655 Family AT Drives Product Manual, Rev. A J8. Options jumper block J5. Master/slave jumper block Circuit Circuit board board External spindle synchro- One drive only nization connection. Attach a two-line cable here. Spare Spindle synchronization Drive is slave through I/O pin 28 Drive is master with Cable select slave present... -
Page 25: Master/Slave Configuration
ST3655 Family AT Drives Product Manual, Rev. A 2.4.3 Master/slave configuration Your drive is shipped with a jumper installed in a spare location on pins 1 and 3 of the master/slave jumper block. If you are installing only one drive, you can leave the jumper installed on pins 1 and 3, or you can remove all jumpers from the jumper block. -
Page 26: Cable Select Option
ST3655 Family AT Drives Product Manual, Rev. A 2.5 Cable select option If your computer and both of your drives support cable select, you can use the cable select option to determine the master and slave, according to the following guidelines, which are illustrated in Figure 4. •... -
Page 27: Figure 4. Connecting Cable-Selected Drives
ST3655 Family AT Drives Product Manual, Rev. A Slave Master Pin 28 is open Master Slave Pin 28 is open Computer Computer Figure 4. Connecting cable-selected drives Note. Early ST3655 family drives do not support the cable select option. To use cable select on an ST3550A, your circuit board part number must be 260058-109 or 260100- xxx . -
Page 28: Spindle Synchronization Option
ST3655 Family AT Drives Product Manual, Rev. A 2.6 Spindle synchronization option If your computer and all of your drives support the spindle synchroniza- tion option, you can use the spindle synchronization to synchronize up to 12 drive spindles to the spindle clock signal (SPSYNC–). Note. -
Page 29: Figure 5. Connecting Synchronized Drives
ST3655 Family AT Drives Product Manual, Rev. A J8. Options jumper block pin 10 pin 9 Figure 5. Connecting synchronized drives Spindle clock Internal index Figure 6. Spindle synchronization timing 13.34 msec ± 0.5% spindle clock period 0.5 µsec minimum to duty cycle 500 µsec maximum 0 µsec ±... -
Page 30: Mounting The Drive
ST3655 Family AT Drives Product Manual, Rev. A 2.7 Mounting the drive You can mount the drive in any orientation. For optimum performance, format the drive in the same orientation as you mount it in the computer. Follow the guidelines below appropriate to the set of mounting holes you elect to use: either bottom mounting holes or side mounting holes. -
Page 31: Figure 7. Recommended Mounting Orientations
ST3655 Family AT Drives Product Manual, Rev. A Figure 7. Recommended mounting orientations... -
Page 32: Figure 8. Mounting Dimensions
ST3655 Family AT Drives Product Manual, Rev. A In the following figure, all dimensions are in inches (mm). 0.030 ± 0.010 (0.762 ± 0.254) 0.150 ± 0.010 (3.810 ± 0.254) 1.00 (25.40) max Six 6-32 UNC-2B threaded holes Max screw insertion depth: 0.13 inch 2.362 ±... -
Page 33: At Interface
The following table lists all commands implemented on the ST3655 family AT interface drives. For a complete description of all AT interface commands, refer to the Seagate ATA Interface Reference Manual , publication number 36111- xxx . The table uses the following abbrevia-... - Page 34 ST3655 Family AT Drives Product Manual, Rev. A continued from previous page Parameters used Command Command name code (in hex) FR SC SN CY DH Format Track Identify Drive Idle 97, E3 Idle and Set Idle Timer Idle Immediate 95, F8, E1 Initialize Drive Parameters Read DMA C8, C9...
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Page 35: Identify Drive Command (Ec H )
ST3655 Family AT Drives Product Manual, Rev. A 3.1.1 Identify Drive command (EC The sector buffer parameters for these drives are listed in the table below. The Seagate ATA Interface Reference Manual , publication number 36111- xxx , describes the Identify Drive command in detail. Word... - Page 36 ST3655 Family AT Drives Product Manual, Rev. A Word Description Value Reserved PIO timing mode 0200 DMA timing mode 0200 Current valid 0003 , 54–58, 64–70 valid Current cylinders Drive-unique Current heads Drive-unique Current sectors per track Drive-unique Current sectors Drive-unique 57–58 Current multiple mode...
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Page 37: Set Features Command (Ef H )
3.2 AT Interface connector pin assignments The signal name and signal direction for each I/O connector pin is described in Figure 9 on page 30. See the Seagate ATA Interface Reference Manual , publication number 36111- xxx , for a complete de- scription of each pin. -
Page 38: Figure 9. At Interface Connector Pin Assignments
ST3655 Family AT Drives Product Manual, Rev. A Drive Host Reset – Host Reset Ground Ground Host Data Bus Bit 7 Host Data Bus Bit 8 Host Data Bus Bit 6 Host Data Bus Bit 9 Host Data Bus Bit 5 DD10 Host Data Bus Bit 10 Host Data Bus Bit 4... -
Page 39: Appendix. Timing Diagrams
ST3655 Family AT Drives Product Manual, Rev. A Appendix. Timing diagrams Without IORDY, the drive operates at mode 3 programmed I/O timing specifications, as shown below. Address valid DIOR− and DIOW− Write data valid Read data valid IOCS16− Figure 10. Programmed I/O timing without IORDY Time Description Cycle time... -
Page 40: Figure 11. Programmed I/O Timing With Iordy
ST3655 Family AT Drives Product Manual, Rev. A When using IORDY, the drive operates at mode 3 programmed I/O timing specifications, as shown below. Address valid IOCS16− DIOR− or DIOW− IORDY Write data valid Read data valid Figure 11. Programmed I/O timing with IORDY Time Description Cycle time... -
Page 41: Figure 12. Multiword Dma Timing
ST3655 Family AT Drives Product Manual, Rev. A The drive operates at mode 1 multiword DMA timing specifications, as shown below. DMARQ DMACK− DIOR− or DIOW− Read data valid Write data valid Figure 12. Multiword DMA timing Time Description Cycle time 180 nsec —... - Page 44 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066, USA Publication Number: 36244-003, Rev. A, Printed in Thailand...
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