Hardware Interface; Dc Power Interface Pin Assignments; Mb Internal Flexible Disc Drive Drive Performance - HP Vectra Reference Manual

Table 9.3
1.2MB Internal Flexible Disc Drive
Drive Performance
360KB Mode 1.2MB Mode
Formatted Capacity 360KB 1.2MB
Recommended Media HP92190A HP 92190X
Track density 48 tpi 96 tpi
Tracks/surface 40 80
Sectors/track
8 or 9
15
Bytes/sector 512 512
Track-to-track seek time 6 msec 3 msec
Average access time
93 msec 93 msec
Data transfer rate
300kHz 500kHz
Motor Start time 500 ms 500 ms
Rotation speed
360 rpm 360 rpm
Hardware Interface
The 1.2MB Internal Flexible Disc Drive interfaces with the system
in two areas; the control interface and the DC power interface.
The signals for operating the disc drive are generated through the
Foe section of the processor board. The 34-pin connector pin
assignments and signal descriptions for the control interface is
given in Section 2. The following table defines the pin
assignments for the DC power interface.
Table 9.4
DC Power Interface Pin Assignments
Pin Signal Name
1
+
12 Vdc
2
+
12 Vdc return
3
+
5 Vdc return
4
+
5 Vdc
108 Disc Drives
Current Requirements
1.2 A (maximum)
0.9 A (maximum)