A - 8 5 A T AREAL
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 2.5"/SUPERSLIMLINE Cylinders 1344| 705| 672|
Capacity form/unform 86/ MB Heads 2| 14| 10|
Seek time / track 15.0/ 3.0 ms Sector/track | 17| 25|
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 0.1 W Altitude km -0.061 3.048| -0.061 12.192
idle 2.0 W Shock g 10 | 100
seek 2.4 W Rotation RPM 2981
read/write 2.0 W Acoustic dBA 30
spin-up 3.8 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-85/A-170 TECHNICAL MANUAL REVISION 1, JUNE 1, 1993
+---------------------------------------------------------+
| Not Jumpers! +++ |
| +++ |XX44
| |XX
| |XX I
| ++++J4 |XX N
| 1++++3 |XX T
| |XX E
| |.X R
| |XX F
| |XX A
| |XX C
| |XX E
| |XX
| |XX
| | 2
+---------------------------------------------------------+
**********************************************************************
J U M P E R S
**********************************************************************
AREAL A-85/A-170 TECHNICAL MANUAL REVISION 1, JUNE 1, 1993
Jumper Setting
==============
There are several, user configurable jumper options located on the
PCBA.
PIN 1 - Master/Slave
--------------------
1 CLOSED Drive is MASTER (default)
OPEN Drive is SLAVE
When pin 1 installed, the drive will respond as drive #1. When
removed, the drive will respond as drive #2. If you have a slave
drive, there must be a master, otherwise your system will hang.
PIN 2 - PDIAG
-------------
2 CLOSED Active Low
PDIAG - This signal is used to signify to a master drive that the
slave drive has passed its internal diagnostics, and is ready for
operation. The CAM specification call for this signal to be active
high, however, the defactor standard is for this line to be active
low. When the PDIAG jumper is installed, it is active low.
PIN 3 - Spare
----------------
Spare - This pin is reserved for future requirements.
**********************************************************************
I N S T A L L
**********************************************************************
AREAL A85/A170 TECHNICAL MANUAL REVISION 1.0, JUNE 1, 1993
Notes on Installation
=====================
Recommend Mounting Configuration
--------------------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
There are no limits on mounting orientation. Screw space is not
required. Maximum insertion length of the 3mm x .5 screws is 0.15"
(3.81mm). All dimensions are toleranced to +/- .010" or +/- .25 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.
Maximum length of this 44 pin cable is 18 inches (457 mm) since it is
TTL driven. Two drives may be daisy chained on this cable, however,
the cable remains restricted to 18 inches.
Recommended mating connectors are as follows:
+-------------------+-------------+---------+-------------------+
|Connector Style | 3M |Dupont | Elco |
+-------------------+-------------+---------+-------------------+
|Flex Cable Straight|150244-6001TH|86456-044|N/A |
+-------------------+-------------+---------+-------------------+
|Ribbon Cable |152244-0100GG|N/A |20-8394-2044-04-101|
+-------------------+-------------+---------+-------------------+
|PCBA Straight |150244-6001TH|86455-044|20-8390-2044-00-101|
+-------------------+-------------+---------+-------------------+
|PCBA Rigth Angle | | | |
|Areal Org. Height |150244-5122TH|N/A |N/A |
|MCC Spec Height |150244-5022TH|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 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 | +DREQ | 22 | Gnd |
+------+-------------------+------+----------------+
| 23 | -Host IOW | 24 | Gnd |
+------+-------------------+------+----------------+
| 25 | -Host IOR | 26 | Gnd |
+------+-------------------+------+----------------+
| 27 | -IOCHRDY | 28 | Not Connected |
+------+-------------------+------+----------------+
| 29 | -DACK | 30 | Gnd |
+------+-------------------+------+----------------+
| 31 | +Host IRQ | 32 | -Host IOCS16 |
+------+-------------------+------+----------------+
| 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 -XT |
+------+-------------------+------+----------------+
Cabling
-------
All 2.5 inch AT/IDE interface drives use a 44 pin male connector that
incorporates power, control, and data signals. This configurations
differs from the 3.5 inch IDE drives which employ a 40 pin signal
connector and separate 4 pin power connector. Therefore, if you are
replacing an existing 3.5 inch drive and are faced with a 40 pin
connector, you will need an adapter card, such as the one shown
below. If your computer is a laptop, a 44 pin connector should be
mounted on the motherboard.
Since power and ground are present at the interface connector, damage
could be induced by offset or upside down connection. Please ensure
that pin 20 of your system's female connector is properly keyed.
Adapter Board
-------------
GND +5VDC
+----+-++
|O O O O|
++ +-----+-+
|+- Pin 44 | ++
|+----------------+ +------++ Pin 40
|+-------------------++-----++
|+--------------------++----++
|+---------------------++---++
|+----------------------+
||
|| ||
|| ||
|+-----------------------+
++Pin 1 +--++ Pin 1
++
Functional Description
----------------------
The A85/170 contains all necessary mechanical and electronic parts to
interpret control signals, position the heads, read and write data,
and provide a contaminant free environment for the heads and disks.
Air Filtration System
---------------------
Inside the HDA, air is recirculated through a .3 micron filter,
providing a clean environment for the recording heads and disks.
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 a single 65 mm diameter glass disk using two 3370
type thin film heads.
**********************************************************************
F E A T U R E S
**********************************************************************
AREAL A85/A170 TECHNICAL MANUAL REVISION 1.0, JUNE 1, 1993
Introduction
------------
Areal Models A85 and A170 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 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
------------
- AT or XT Modes of Operation
- Automatic Error Correction and Retries
- Automatic Microprocessor Controlled Diagnostics
- Buffer Size 32 KB
- Extremely Low Power Requirement
- Internal Air Filtration System
- Lightweight: 4.4 Oz (A170) or 3.4 Oz (A85)
- Programmable Low Power Modes
- 100 G Non-Operation Shock Tolerance
Error Correction
----------------
The A85/170 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
---------
+----------------------------------+--------+
| | 85/170 |
+----------------------------------+--------+
|Track-to-Track msec. typ. | 3 |
+----------------------------------+--------+
|Average msec. typ. | 15 |
| msec. max. | 24 |
+----------------------------------+--------+
|Latency msec. avg. | 10.1 |
+----------------------------------+--------+