Program Shunt Module - Siemens Microfloppy FDD100-5 Operating And Maintenance Manual

STEP
~~~SECI
_ _
---------,U
LOAD HEAD
------......;..----------~s~
14~SEC
I
8
~SEC
I
. .
....
..
VALID
READ DATA
~
50 MSEC MIN_I
A
I
B
I
A
~I--
A 1.0
~
0.25
~SEC
A - LEADING EDGE OF BIT MAY BE ~ 800 NSEC FROM ITS NOMINAL POSITION
B - LEADING EDGE OF BIT MAY
BE~
400 NSEC FROM ITS NOMINAL POSITION
Flgure 2-11. Read Timing
ICSOCKET
HS
D
HS
DS1
DS1
DS2
DS2
PROGRAM SHUNT
DS3
DS3
MX
MX
(BLANK)
(BLANK)
HM
D
HM
A
• SINGLE DRIVE CONFIGURATION
• HEAD LOAD WITH DRIVE SELECT
B
• MULTIPLE DRIVE CONFIGURATION
• HEAD LOAD WITH MOTOR ON
• DRIVE NUMBER 2 PROGRAMMED
HS - HEAD SELECT - HEAD IS LOADED BY DRIVE SELECT SIGNAL
DS1 - DRIVE SELECT 1 - SELECT SIGNAL FOR DRIVE ONE.
DS2 - DRIVE SELECT 2 - SELECT SIGNAL FOR DRIVE TWO.
DS3 - DRIVE SELECT 3 - SELECT SIGNAL FOR DRIVE THREE.
MX - MULTIPLEX - MUST BE CUT FOR MULTIPLE DRIVE CONFIGURATION.
HM - HEAD MOTOR - HEAD IS LOADED BY MOTOR ON SIGNAL.
Figure 2-12. Program Shunt Module
2-13