Fujitsu M2361A Customer Engineering Manual page 103

h. Sector (Status 7)
The Sector mark is also derived from the servo information. The
number of sectors per revolution is selectable by 16-Bit DIP switches
and ts determined by counting Byte Clock. The DIP switches are
located on the PCB BI7B-0270-0010A#U. Each switch represents a
binary number minus 1 of Byte Clock to be counted in each sector.
(3) Sector Status (Status 0 ~ 7)
Indicates the current sector address from 1 to 255 in the drive. Refer to
Figure 4.5.23 for timing of Sector Address.
(4)
Write/Read Check Status
Indicates the fault status while in the Write or Read operation. When one
of these conditions occurs in the drive, the Fault signal in the Unit
Status is issued as a summary to the controller. It can be cleared by
Fault Clear Signal from the controller.
a. Index Check (Status 0)
Indicates that the Index signal is not detected where it should be or
was detected where it should not have been while performing
Write/Read operations.
b. Control Check (Status 1)
The following fault conditions cause Control Check.
1. Write and Read Gate are issued at the same time.
2. Write operation during offset mode.
3. Write Gate is issued in the write protect mode.
c. Multi-Head Check (Status 2)
Indicates that two or more head ICs are selected simultaneously.
d. Head Short Check (Status 3)
Indicates that abnormal current was sensed in the Write Select line
during write operation.
e. Write Current on Read Check (Status 4)
Indicates that write current was sensed during a read operation.
f. Write Transition Check (Status 5)
Indicates that write current has not been switched for writing data.
The detection is continued from byte-8 after Write Gate is true until
the end of the Write operation.
g. Delta I Write Check (Status 5)
4 - 32
Indicates that an abnormal write current was sensed in the inner head
or outer head.
B03P-4825-0002A ••.
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