4. Peak currents are as specified in figures 2-3.
1.3
Functional characteristics
This drive consists of read/write and control electronics, drive mechanism, read/write
heads, and precision track position mechanism. These components perform the
following functions:
a. Interpret and generate control signals.
b. Move read/write heads to the desired track.
c.
Read and write data.
The interface signals and their relationship to the internal functions are shown in
figure 1-2.
1.3.1
Read/write control electronics
The electronics package contains:
a. Index detector circuits.
b. Head positioning driver circuits.
c.
Read/write amplifier and transition detector.
d. Write protect detector.
e. Drive select circuits.
f.
Drive motor control circuits.
g. Control logic LSI.
h. Track ¯ detector.
i.
Media detector.
5
Power
(W)
4.0
2.0
Stand by
Read
Write
Seek
Motor ON
0.2
0.4
0.6
0.8
Current
(A)
4.0
6.0
8.0
10.0
0
Max. power
consumption
12V current typ
5V current typ
Typ power
Consumption
Figure 1-1. D.C. power profile of power consumption
Leaflet No. 9419 26/4/97 6:09 pm Page 5
