A - 1 8 0 A T ( 1 9 9 2 ) AREAL NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 2.5"/SUPERSLIMLINE Cylinders 1430| 715| | Capacity form/unform 182/ MB Heads 4| 10| | Seek time / track 15.0/ 3.0 ms Sector/track | 50| | Controller IDE / AT Precompensation Cache/Buffer 32 KB Landing Zone Data transfer rate 1.875 MB/S int Bytes/Sector 512 5.630 MB/S ext Recording method RLL 2/7 operating | non-operating -------------+-------------- Supply voltage 5 V Temperature *C 5 55 | -40 60 Power: sleep 0.1 W Humidity % 8 80 | 8 80 standby 0.3 W Altitude km -0.061 3.048| -0.061 12.192 idle 1.3 W Shock g 10 | 100 seek 1.6 W Rotation RPM 2981 read/write 1.6 W Acoustic dBA 35 spin-up 3.0 W ECC Bit 56 MTBF h 100000 Warranty Month Lift/Lock/Park YES Certificates CSA,TUV,UL1950 ********************************************************************** L A Y O U T ********************************************************************** AREAL A-120/180 TECHNICAL MANUAL REV. 2.0, JULY 1, 1992 +---------------------------------------------------------+ | NOT JUMPERS** | | ** |XX44 | |XX | |XX I | *** |XX N | *** |XX T | 123 |XX E | |X* R | |XX F | |XX A | |XX C | |XX E | |XX | | 2 | |xx50 +---------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** AREAL A-120/180 TECHNICAL MANUAL REV. 2.0, JULY 1, 1992 Jumper Setting ============== User Options ------------ There are three user configurable, jumper options located on the PCBA. +----------+-------+ | IN | OUT | +--+-------+-------+ |1 |MASTER*|SLAVE | +--+-------+-------+ |2 |PDIAG |PDIAG* | +--+-------+-------+ |3 |SPARE |SPARE* | +--+-------+-------+ * Denotes Factory Setting +--------------+-----+ +--------------+-----+ |Configuration |JMP1 | |Configuration |JMP2 | +--------------+-----+ +--------------+-----+ |Master Drive |IN | |CAM PDIAG |IN | +--------------+-----+ +--------------+-----+ |Slave Drive |OUT | |Non CAM PDIAG |OUT | +--------------+-----+ +--------------+-----+ NOTE The Common Access Method (SAM) specification calls for PDIAG to be negated by the slave drive within 400 msec of the trailing edge of RESET. Most of the disk vendors, however, use the opposite polarity. ********************************************************************** I N S T A L L ********************************************************************** AREAL A-120/180 TECHNICAL MANUAL REV. 2.0, JULY 1, 1992 Notes on Installation ===================== Recommended Mounting Configuration ---------------------------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | | | | | | | +---------------------+ | +-----+ +-----+ | +-+-----------------+-+ +--+ +--+ | | | | +-----------------+ This drive is designed to be used in applications where the unit may experience extreme levels of both shock and vibration. There are no limits on mounting orientation and mounting clearance is not required. Maximum insertion length of the 3 mm x .5 screws is 0.15" (3.8 mm). Physical Connection - AT Interface ---------------------------------- Both power and control signals are supplied to the drive through a single 44 pin cable. Please note that separate power is supplied to the logic and motor circuits to minimize noise coupling. Two drives may be daisy chained on a single cable, but the maximum total allowable cable length remains 18 inches. Recommended mating connectors are as follows: +-------------------+---------+-------------------+ |Connector Style |Dupont | Elco | +-------------------+---------+-------------------+ |Flex Cable |86456-044|N/A | +-------------------+---------+-------------------+ |Ribbon Cable |N/A |20-8394-2044-04-101| +-------------------+---------+-------------------+ |PCBA Straight |86455-044|20-8390-2044-00-101| +-------------------+---------+-------------------+ |PCBA Rigth Angle |88333-044|20-8390-2044-01-101| +-------------------+---------+-------------------+ Electrical Description - AT Interface ------------------------------------- All signal levels are TTL compatible. A logic "1" is from 2.0 volts to 5.0 volts. A logic "0" is from 0.0 volts to 0.7 volts. The interface between the drive adapter and the drive is termed the "Host Interface". The set of registers in the I/O space of the Host is known as the "Task File". All signals on the Host Interface have the prefix Host. All negativ- ely active signals are prefixed with a "-" designation. All positiv- ely signals are prefixed with a "+" designation. Signals whose source is the Host are "outbound" and those whose source is the drive are "inbound". +------+-------------------+------+----------------+ | Pin | Signal | Pin | Signal | +------+-------------------+------+----------------+ | 01 | -Host Reset | 02 | Gnd | +------+-------------------+------+----------------+ | 03 | +Host Data 7 | 04 | +Host Data 8 | +------+-------------------+------+----------------+ | 05 | +Host Data 6 | 06 | +Host Data 9 | +------+-------------------+------+----------------+ | 07 | +Host Data 5 | 08 | +Host Data 10 | +------+-------------------+------+----------------+ | 09 | +Host Data 4 | 10 | +Host Data 11 | +------+-------------------+------+----------------+ | 11 | +Host Data 3 | 12 | +Host Data 12 | +------+-------------------+------+----------------+ | 13 | +Host Data 2 | 14 | +Host Data 13 | +------+-------------------+------+----------------+ | 15 | +Host Data 1 | 16 | +Host Data 14 | +------+-------------------+------+----------------+ | 17 | +Host Data 0 | 18 | +Host Data 15 | +------+-------------------+------+----------------+ | 19 | Gnd | 20 | Key | +------+-------------------+------+----------------+ | 21 | Not Connected | 22 | Gnd | +------+-------------------+------+----------------+ | 23 | -Host IOW | 24 | Gnd | +------+-------------------+------+----------------+ | 25 | -Host IOR | 26 | Gnd | +------+-------------------+------+----------------+ | 27 | -IOCHRDY | 28 | Not Connected | +------+-------------------+------+----------------+ | 29 | Not Used | 30 | Gnd | +------+-------------------+------+----------------+ | 31 | +Host IRQ | 32 | -Host IO16 | +------+-------------------+------+----------------+ | 33 | +Host Address 1 | 34 | -Host PDIAG | +------+-------------------+------+----------------+ | 35 | +Host Address 0 | 36 | +Host Address 2| +------+-------------------+------+----------------+ | 37 | -Host CS0 | 38 | -Host CS1 | +------+-------------------+------+----------------+ | 39 | -Host Active/Slave| 40 | Gnd | +------+-------------------+------+----------------+ | 41 | +5 Volt Logic | 42 | +5 Volt Motor | +------+-------------------+------+----------------+ | 43 | Gnd | 44 | +AT Interface | +------+-------------------+------+----------------+ Air Filtration System --------------------- Recirculated air is forced through a .3 micron filter, providing a clean environment for the recording heads and disks. ********************************************************************** F E A T U R E S ********************************************************************** AREAL A-120/180 TECHNICAL MANUAL REV. 2.0, JULY 1, 1992 Introduction ------------ The Areal Models A120 and A180 are 2.5 inch, high capacity, ruggedized, high performance, low power, low profile disk drives. By design, they are ideal for notebook, laptop, or portable applications. Both units incorporate the IBM PC-AT/XT Task File control logic and requires only chip select decode logic to allow bus connection. This logic is included in a number of commercially available adapter boards. Key Features ------------ - Automatic Error Correction and Retries - Automatic Microprocessor Controlled Diagnostics - Buffer Size of 32 KB - Embedded Servo System - Extremely Low Power Requirement (5 Volt only) - Internal Air Filtration System - Master/Slave Compatibility - Programmable Low Power Modes - Universal Translation - 100 G Non-Operation Shock Tolerance Error Correction ---------------- The A120/180 employs a 56 bit ECC polynomial capable of correcting single burst errors up to 21 bits. Single burst errors up to 56 bit and double burst errors up to 41 bits can be detected. Seek Time --------- +----------------------------------+--------+ | | 120/180| +----------------------------------+--------+ |Track-to-Track msec. typ. | 3 | +----------------------------------+--------+ |Average msec. typ. | 15 | | msec. max. | 24 | +----------------------------------+--------+ |Latency msec. avg. | 10.1 | +----------------------------------+--------+ Drive Mechanism --------------- A brushless DC motor rotates the spindle at 2981 RPM. Back EMF of the motor is used to quickly stop the spindle when power is removed. Read/Write Heads and Disks -------------------------- Data is recorded on two 65 mm diameter glass disks using longitudinal recording thin film heads. Head Positioner Mechanism ------------------------- Four read/write heads are positioned using a rotary voice coil actuator. Read/Write and Control Electronics ---------------------------------- Internally, a single IC is mounted in close proximity to the heads to control head selection, read preamplification, and the write data circuitry. The read/write heads are mounted to a voice coil actuator. The microprocessor controlled circuit board provides the remaining electronic functions which include: - Spindle Motor Control - Interface Control - Power Management - Read/Write Circuitry - Rotary Actuator Control - Spin Speed Control The microprocessor performs an extensive battery of tests when power is applied and will not come READY if an error is detected. Error Reporting --------------- When the drive receives a command from the Host, it checks for validity of the command, and with the exception of the Initialize Drive Parameters command, also checks register values for valid range. If the values are invalid, the drive does not execute the command, but instead posts the "ERR" bit in the Status register and the "ABRT" bit in the Error register. If a data error occurs during command execution, the command is terminated immediately.