NEC FDl165 Product Description Download Page 2

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Summary of Contents for FDl165

Page 1: ...FDl165 Flexible Disk Drive Product Description NEe NEe Information Systems lnc 819 000090 1001 4 82 ...

Page 2: ... the system among other factors While NEC Information Systems Inc products are considered to be compatible with most systems the spe cific functional implementation by customers of the product may vary Therefore it is the customer s responsibility to determine the suitability of a product for a specific application and is not warranted by NEC Information Systems Inc First Printing April 1982 Copyr...

Page 3: ...enoid Interface Diagnostics Option Selection Variable Frequency Oscillator Optional 1 1 1 1 1 1 1 3 1 3 1 3 1 4 1 4 1 4 1 4 1 4 1 4 1 5 1 5 1 5 CHAPTER 2 INSTALLATION 2 1 2 2 PRELIMINARY INSPECTION UNPACKING REPACKING PROCEDURE 2 1 2 1 SYSTEM REQUIREMENTS 2 3 2 2 1 2 2 2 2 3 1 2 3 2 2 3 3 Unpacking Procedure Repacking Procedure Operating Environment Space and Weight Data Power Requirements 2 1 2 1...

Page 4: ...to 4 DXl to DX4 Head Load HDL Step STP Direction Select DIR Side Select SSL Wr i te Gate WGT Write Data WDT Current Changeover LWC Reset FLR In Use 3 3 3 3 3 4 3 4 3 4 3 4 3 4 3 6 3 6 3 6 3 4 OUTPUT SIGNAL FUNCTIONS 3 6 3 4 1 3 4 2 3 4 3 3 4 4 3 4 5 3 4 6 3 4 7 3 4 8 Index IDX Track 00 TKC Dual Sided TSD Ready ROy File Unsafe FUS Read Data RDT Write Protect PRT Disk Change DCG 3 6 3 6 3 6 3 7 3 7 ...

Page 5: ...5 3 6 6 Power On Sequence Drive Select Step and Track 00 Access Wr i te Read After Step TABLES 3 10 3 10 3 10 3 10 3 11 3 12 Table 1 1 1 2 2 1 2 2 Title Model FDl165 Capacity Model FDl165 Specifications Door Lock Plug Combinations Test Pins and Signals v Page 1 5 1 5 2 9 2 12 ...

Page 6: ...r Installation Air Flow Requirements for Natural Air Cooli ng Interface Cables Between Disk Drive and Controller Interface Connectors Physical Location Diagram Data and Control Interface Connector Signal Edge Cord Connector Circuit Ass ignments Driver and Receiver Circuits Step Signal Timing Write Gate Signal Timing Write Data Signal Timing Index Signal Timing Read Data Signal Timing Disk Change S...

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Page 9: ...ed by an ex ternal controller NEe PD765 is recommended through a transistor transistor logic TTL interface Dc power is supplied and controlled externally Operator controls on the disk drive consist of a door handle and READY and BUSY lamps on the front panel see Figure 1 1 1 2 1 Compact Size and Design The most apparent features of the Model FDl165 Flexible Disk Drive are its small size and light ...

Page 10: ...ates problems associated with conventional ac motor drives Dr i ve pulleys and belts and the problems associated with these parts are eliminated The special brush type dc motor draws less power only 26 w than conventional ac motors so that low power inexpensive power supplies can be used Concerns about different ac voltages and frequencies are eliminated Less heat is produced by the disk drive tha...

Page 11: ...Before you can unload the flexible disk the BUSY lamp on the front panel must be off The door slot does not open if the flexible disk is being used by the host controller 1 2 3 Dc Direct Drive Spindle Motor The disk spindle is driven by a dc motor This direct drive dc motor makes dr i ve bel ts and pulleys unnecessary and minimizes the power required The motor provides a media up to speed time of ...

Page 12: ...ontrolled special cam governs head loading reducing damage to the flexible disk surface thereby in creasing flexible disk operating life and data integrity 1 2 7 Display LEOs Two LEOs on the front panel provide a visual display of the ready and busy states of the disk drive 1 2 8 Door Lock Solenoid The door lock solenoid makes it impossible to remove a disk during certain drive operations thereby ...

Page 13: ...able 1 2 Table 1 1 Model FD1l65 Capacity Formatted CAPACITY SINGLE SIDED DUAL SIDED DUAL SIDED Bytes SINGLE DENSITY SINGLE DENSITY DOUBLE DENSITY Per diskette 24 K 284K 303K 493K 568K 606K 985K 1137K 1212K Per track 3328 3840 4096 3328 3840 4096 6656 7680 8192 Per sector 128 256 512 128 256 512 256 512 1024 Sectors per track 26 15 8 26 15 8 26 15 8 Table 1 2 Model FD1l65 Specifications FEATURES SP...

Page 14: ...een Failures ean Time To Repair Component Life Soft Error Rates Hard Error Rates Seek Error Rates Media IBM Diskette 1 or equivalent IBM Diskette 2 or equivalent IBM Diskette 2D or equivalent 8 48 tpi 360 rpm 3 0 ms 15 0 ms 30 0 ms 83 3 ms 0 6 second 24 Vdc 10 0 9 Amp maximum 5 Vdc 5 0 8 Amp maximum without VFO 0 9 Amp maximum with VFO 26 watts 27 watts with VFO 2 28 inches 58 mm 8 55 inches 217 2...

Page 15: ...ing procedure 2 2 UNPACKING REPACKING PROCEDURE This section describes how to unpack and repack the disk drive 2 2 1 Unpacking Procedure To unpack the disk drive refer to Figure 2 1 and follow these steps Save all shipping materials for possible future use a Remove the tape band from around the shipping package b Slide the styrofoam case out of the cardboard sur round c Open the styrofoam case d R...

Page 16: ...PLASTIC FILM COVER Figure 2 1 Unpacking Diagram 2 2 ...

Page 17: ...e to 45 C and relative humidity of 20 to 80 The maximum ambient stray magnetic field is specified as 4000 Aim Typical heat dissipation by the disk drive is 22 3 Kcal h 23 3 Kcallh with VFO 2 3 2 Space and Weight Data The disk drive is designed for vertical horizontal or perpendicular shelf mounting Provide space for cabling and servicing Refer to Figure 2 2 for overall dimensions The unit weighs 7...

Page 18: ...disk from the unit c Insert a flexible disk through the door press the door handle to latch posi tion and check that the collet assembly engages the flexible disk wi thout binding Turn the spindle and check that the flex ible disk rotates freely d Press the door handle and check that the flexible disk is ejected 2 4 2 Drive Designation If more than one disk dr i ve is connected to the same con tro...

Page 19: ... disk dr ives are used in a system four maximum assign each one a different OX number and insert the shorting plug for that unit appropri ately see Figure 2 3 The unit is supplied with DXI selected 2 4 2 3 Option Selection The following section describes option selection on the FDl165 PCB See Figure 2 3 for the location of the selec tion plugs and pins and a configuration chart See Chapter 3 for a...

Page 20: ... e m J T2 T1 l I I 2 as 11 BU 2 i RD 2 1 ID RV3 DX1 DX2 DX3 DX4 1 3 1 3 1 3 1 3 CJ OX PLUG CJ 2 4 2 4 2 4 2 4 POS1 POS2 RX Hl DR PR Dl DH 1E 2 1 E 2 BU PLUGS POS1 POS2 US RD PINS SOLDER TYPE 2 1 2 1 POS1 POS2 BS FR 2 E31 2E3 1 PLUGS T2 T3 T2 T3 PLUGS T3 BT2 T3Ej T2 Figure 2 3 Terminator Resistor and Selection Plug Location and Selection Plug Configuration on PCB 2 6 ...

Page 21: ...C CABLES I A PARALLEL CONFIGURATION FOUR DRIVES MAXIMUM A SIGNAL CABLES V V V FLEXIBLE DISK FLEXIBLE FLEXIBLE FLEXIBLE FLEXIBLE DRIVE DISK DRIVE DISK DRIVE DISK DRIVE DISK DRIVE CONTROLLER DX1 DX2 DX3 DX4 DC CABLES I B SERIAL CONFIGURATION MOUNTTERMINATOR RESISTOR ARRAYS RN1 AND RN2 Figure 2 4 Cable Connections from Disk Drives to Controller 2 7 ...

Page 22: ... a wr i te protect notch The uni t is supplied with PR 1 selected FILE UNSAFE PLUG FR When you select plug position 1 you disable the File Unsafe function When you select plug position 2 you enable the File Unsafe function The unit is supplied with FR 2 selected DOOR LOCK PLUGS DR DL DH The FDl165 three door lock function plugs which you use in different combinations determine when a door lock con...

Page 23: ...lected DH Plug This plug controls the door lock hold status When you select plug position 1 you disable the hold status When you select plug position 2 you enable the hold status The uni t is supplied wi th DH 1 selected Table 2 1 Door Lock Plug Combinations PLUG PLUG IN USE PLUG NO ID POSITION POSITION EXPLANATION 1 DR 1 1 Door lock Ready and DL 1 Drive Select and Head DH 1 hold Load or disable D...

Page 24: ...S The busy lamp plugs determine the conditions under which the busy lamp will be on The unit is supplied with BU 2 and BS 2 selected Busy Lamp on During Head Load To have the busy lamp on when a Head Load signal is present select BU 2 and BS 2 Busy Lamp on During Drive Select To have the busy lamp on when a Drive Select signal is present select BU 2 and BS 1 Busy Lamp on During In Use To have the ...

Page 25: ...auto seek and auto tap functions To select the auto seek and tap test a Turn off the power b Connect diagnostic pins T2 and T3 to the center pin c Select HL2 and connect HL2 to ground d Turn on the power and the auto seek and tap test starts HEAD UNLOAD DELAY Tl To delay the head unload action 250 ms short pin Tl to ground With Tl shorted head load unload commands are ig nored when they occur less...

Page 26: ...be adjusted in the field RV3 deter mines the speed of the spindle motor This trimpot is ad justed at 166 6 0 5 ms 2 4 3 Mounting and Wiring The disk drive can be mounted vertically or horizontally and peI pendicular Recommended mounting methods are shown in Figures 2 5 2 6 and 2 7 Recommended space requirements for adequate air flow are shown in Figure 2 8 When the disk drive is installed in the s...

Page 27: ... KNOB I J STEP MOTOR I I I SPINDLE MOTOR I Figure 2 5 Vertical Installation COLLET ASSEMBLY SPINDLE MOTOR STEP MOTOR Figure 2 6 Horizontal Installation KNOB I I 11111111 1 Figure 2 7 Perpendicular Installation 2 13 ...

Page 28: ...mmJ B Two or Four Disk Drives NOTE AIR FLOW SHOWN BY SOLID LINES PASSES AROUND DISK DRIVES AIR FLOW SHOWN BY BROKEN LINES PASSES THROUGH DISK DRIVES BY HOLES IN THE COUPLED BRACKET EXTERNAL WALL Figure 2 8 Air Flow Requirements for Natural Air Cooling 2 14 ...

Page 29: ...IVE SELECT 1 26 SIGNAL DfUVE SELECT 2 28 CONN DRIVE SELECT 3 30 DfUVE SE LECT 4 32 DIRECTION SELECT 34 STEP 36 WRITE DATA 38 WFUTE GATE 40 TRACK 00 42 WRITE PROTECT 44 READ DATA 46 MFM 48 WINDOW 50 PIN SIGNAL NAME NO DC 24 V 1 GROUND 2 DC 5 V 3 POWER GROUND 4 CONN 5 6 FG 7 SIGNALS USED ONLY WHEN VFO OPTION IS INSTALLED Figure 2 9 Interface Cables Between Disk Drive and Controller 2 15 ...

Page 30: ...e wiring verify all connections then test using this general procedure a Install a test flexible disk and apply dc power Check for abnormalities and note that the drive motor starts and brings the disk spindle up to speed b Use whatever diagnostic test programs are available to exercise the disk drive through write and read operations and repeated head positioning scans 2 16 ...

Page 31: ...cts are located on the component side of the PCB and the odd numbered contacts are located on the non component side of the PCB as shown in Figure 3 1 The signal assignments for this connector are shown in Figure 3 2 tll 2 4 6 8 48 50_ CONTACT NUMBER ON THE COMPONENTSIDE 3 5 7 47 49_ CONTACT NUMBER ON THE NON COMPONENT SIDE Figure 3 1 Data and Control Interface Connector 3 2 SIGNAr LEVELS All data...

Page 32: ...TEP WRITE DATA WRITE GATE TRACK 00 WRITE PROTECT READ DATA MFM WINDOW SIGNALS ENABLED BY PLUGS SIGNALS USED ONLY WHEN VFO OPTION IS INSTALLED Figure 3 2 Signal Edge Cord Connector Contact Assignments Each driver circuit delivering a signal from the disk drive to the controlle is an open co lector type of SN7438 which provides a maximum sink current of 40 rnA at the low level Each receiver circuit ...

Page 33: ... 3 3 1 Drive Select 1 to 4 DXl to DX4 These lines select one to four disk drives in a system A disk drive is selected and its input output lines are ef fective when its drive select line goes low To designate each disk drive insert a shorting plug into the desired terminal DXl to DX4 on the PCB For example to designate a specific disk drive as number 1 insert the shorting plug into the DXl termina...

Page 34: ... SSL is high it selects flexible disk side 0 upper side If it is low it selects side 1 lower side Sig nal SSL occurs 100 ps before the READ WRITE operation Note that side 0 is used in the single sided disk 3 3 6 write Gate WGT If this line is low data is written to the flexible disk If the line is high data is read from the flexible disk Data is erased from the flexible disk for 560 ps after the s...

Page 35: ...D SIGNAL CANNOT BE TURNED OFF THE SIDE SELECT SIGNAL CANNOT BE CHANGED AND THE STEP OPERATION CANNOT BE ENABLED IN THIS INTERVAL Figure 3 5 Write Gate Signal Timing WDT FM T 2 ps W 0 15 TO 1 ma 2T 4 p s t 12 ns WDT _ J W I MFM I T 2ps W 0 15 ps TO 1 ps 2T 4 ps 12 ns Figure 3 6 Write Data Signal Timing 3 5 ...

Page 36: ... low on this line instructs the disk drive to hold a door lock condition 3 4 OUTPUT SIGNAL FUNCTIONS A description of the functions of the output signals fol lows 3 4 1 Index lOX This line lOX signals the start point of a track on the flexible disk once every rotation The resulting pulse is shown in Figure 3 7 3 4 2 Track 00 TKC When TKC is low the head is on the zero track 3 4 3 Dual Sided TSD Th...

Page 37: ...ive for any of the following conditions WGT WDT The WRITE DATA signal does not appear within 18 s after WRITE GATE becomes active HDr WGT The WRITE GATE signal is active but HEAD LOAD is not ROY WGT The WRITE GATE signal is active but READY is not WGT STP The STEP signal is active at the same time the WRITE GATE signal is active 3 4 6 Read Data ROT This line RDT conveys signal conditioned data rea...

Page 38: ...TECT notch and low if the disk has a notch A notch prevents writing 3 4 8 Disk Change DCG This signal goes low to signal the controller that the flexible disk has been changed since the disk drive was last selected The time relationships are shown in Figure 3 9 DOOR IDISK CHANGE CLOSE 1 O PE N I_c_L_OS_E _ DRIVE SELECT P DISK CHANGE P u Figure 3 9 Disk Change Signal Timing 3 8 ...

Page 39: ...a SRD This line conveys STANDARDIZED READ DATA which is synchron ized by the VFO circuit to make it more easily and more re liably read The time relationship between the STANDARDIZED READ DATA SIGNAL AND THE WINDOW signal fs shown in Figure 3 10 Timing becomes irregular once the data splice point is passed until the VFO is re synchronized 3 5 4 Window WID This signal distinguishes between clock pu...

Page 40: ...processed by the disk drive 500 ns after the appropriate dr ive select line DXl DX2 DX3 or DX4 goes low 3 6 3 Step and Track 00 The required time relationship between the STEP controller signal and the TRACK 00 output signal is shown in Figure 3 11 STP U u TRO T I T 2 5 ms MAX Figure 3 11 Step and Track 00 Signal Timing 3 6 4 Access The required time relationship among WRITE GATE STEP and DIRECTIO...

Page 41: ... BE MORE THAN 18 ms Figure 3 12 Access Timing 3 6 5 Write The required time relationship of controller signals during a WRITE operation is shown in Figure 3 13 SIDE SELECT SSU WR ITE GATE WGn HEADLOAD HDU _ I 50 ms MINI j STEP STP l nJljr _I 18 ms MINI J O s I00 MINI N I I r 4 MAX l j 4 s MAXI WRITE DATA WDT lJl Jlr Figure 3 13 write Timing 3 11 ...

Page 42: ... of controller signals during a READ AFTER STEP operation is shown in Figure 3 14 HEAD LOAD HDL _ 1 50m IMINI j STEP STP 1 1 8 m lMINI SIDE SELECT SSL 1 I 1 00 IIS M IN READ DATA ROT Wh ESrnWJw WRITE GATE WGT 11 j Figure 3 14 Read After Step Timing 3 12 ...

Page 43: ... S COMMENTS FORM Document FDl165 Flexible Disk Drive Product Description Document No 819 000090 1001 Please suggest improvements to this manual Please list any errors in this manual Specify by page From Name Title _ Company Address _ Date ...

Page 44: ...SS REPLY CARD FIRST CLASS PERMIT NO 386 LEXINGTON MA POSTAGE WILL BE PAID BY ADDRESSEE NEe Information Systems Inc Dept Publications 5 Militia Drive Lexington MA 02173 NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES FOLD HERE sell or tl In edges or mllllng do nol us Itlpl l ...

Page 45: ...NEe NEe Information Systems lnc 5 Militia Drive Lexington Massachusetts 02173 617 862 3120 ...

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