Floppy Disk Interface; Standard Electronic And Physical Interface; Connector; Radiation Immunity - Adaptec AHA-1740A Technical Reference Manual

EISA-to-Fast SCSI Host Adapter

Floppy Disk Interface

Standard Electronic and Physical interface

Driver Output Signals
V
OL
V
OH
I
OL
I
OH
Receiver Input Signals
V -
T
VT+
Tied to +5 volt supply through 150 ohm resistors. Schmidt Trigger with 0.8-volt hysteresis

Connector

Unshrouded 34-pin header. Partial list of compatible connector plugs (for reference
only):
Manufacturer
3-M
T&B Ansley
The cable for the floppy connector should be good quality 34 conductor flat cable with
28 gauge conductors. Addressing of the second drive may be generated by twisting
connector signals 10 through 16 or by changing jumpers in the floppy disk drives.

Radiation Immunity

Meets radiation limits specified for a Class B computing device in accordance with
the specifications in Subpart J of Part 15 of FCC Rules. See FCC Compliance notes
and recommendations in preface of this document.

Reference Documents

EISA Specification, v3.11 from BCPR Services
Intel 82355 (BMIC) functional data sheet Revision 2.5 or later
Small Computer System Interface, ANSI X3T9.2/86-109 Revision 10h, Ameri-
can National Standards Institute
0 volts minimum
Open collector
60 mA
0.1 mA
1.0 volts maximum
1.4 volts minimum
Model
N.A.
N.A.
Introduction
0.5 volts maximum
5.25 volts maximum
Part Number
3414-6000
609-3400M
1-9