Table of Contents
Advertisement
SECTION 4
INTERFACE
4.1
CONTROL CABLE
The daisy-chained Control Cable is a flat cable consisting of 17 twisted pairs (34-conductors).
The 34-position connector recommended for the Control Cable is AMP part number 88373-3, or
equivalent.
Maximum cable length is 20 feet (6 meters).
Control Cable signals are TTL compatible.
With the exception of DRIVE SELECT, Control Cable signals are inhibited until the drive is selected.
In a daisy-chain configuration, the 16-pin terminator chip, located on an IC socket on the main circuit card,
must be installed on only the last drive in the daisy-chain.
Pin assignments for the Control Cable are shown in Table 9.
4.2
DATA CABLE
The star-configured Data Cable, is a flat cable consisting of 10 twisted pairs (20-conductors).
The 20-position connector recommended for the Data Cable is AM P part
number 88373-6, or equivalent.
Maximum cable length is 10 feet (3 meters).
The following Data Cable signals are differential signal pairs:
Write Clock
(pins 7
&
8)
Read/Reference Clock (pins 1 0
&
11)
NRZ Write Data
(pins 13 & 14)
NRZ Read Data
(pins 17 & 18)
The following Data Cable signals are TTL compatible:
Drive Selected
(pin 1)
Sector/Address Mark
(pin 2)
Address Mark Enable
(pin 4)
Index Mark
(pin 20)
Data Cable differential signals are enabled at all times, regardless of the drive's selected status. Pin
assignments for the Data Cable are shown in Table 10.
4-1
MK-150FA Series OEM Manual
Advertisement
Table of Contents
