Specifications

+5V
RR
+ DRIVE SELECT 2:......-- •• ."./'}.II~--*"-...,--"-~~"""""" R 22
D----------------1~/~/~.~--------~~~
+ READY ~--------------~ __ ~
FIGURE 7·10. RADIAL READY CIRCUIT
7.12 STEPPER POWER DOWN
..
II
II
II
If
II 2
li= =-==-=--------*"-
2
)E
II
II
.. 4
I,:' - -:II:11 .... -----*"-
4
)(
II
II 6
I~= = = ... .-"'-- ___ -"--*_
6
)(
~READY
39216·28
If the user wishes to step the drive at a step rate of 6 ms or slower. enabling this option will allow the drive to main-
tain
~ low noise emission level.
To install this option on a standard drive, jumper trace PD.
7.13 WRITE PROTECT OPTIONAL USE
As shipped from the factory. the write protect feature will internally inhibit writing when a write protected diskette is
installed. With this option installed. a write protected diskette wiWnot inhibit writing, but it will be reported to the in-
terface. This option may be useful in identifying special use diskettes.
To install this option on a drive with the write protect feature. the following traces should be added or deleted.
a.
Cut trace WP.
b. Connect trace NP.
Figure 7-11 illustrates the circuitry.
-WRITEPROTECl l~~~~~~~.~~~~~~~~~~~--~lTOINTERFACE
WNPP~:~D __ -f
- 2 TO WRITE CU RRENT
l~-------~---~
39216·29
FIGURE 7·11. WRITE PROTECT CIRCUIT
7-10