參數(shù)資料
型號: IT8673F
廠商: Electronic Theatre Controls, Inc.
英文描述: GT 35C 35#12 SKT PLUG
中文描述: 先進(jìn)的輸入/輸出(高級I / O)的初步規(guī)范V0.5
文件頁數(shù): 64/128頁
文件大?。?/td> 780K
代理商: IT8673F
IT8673F
4
54
Table 11-11. Status Register 1 (ST1)
Bit
Symbol
Name
Description
7
EN
End of Cylinder
Indicates the FDC attempted to access a sector beyond the final sector of the
track. This bit will be set if the Terminal Count (TC) signal is not issued after a
READ DATA or WRITE DATA command.
6
NU
Not Used
-
5
DE
Data Error
A CRC error occurred in either the ID field or the data field of a sector.
4
OR
Overrun/
Underrun
An overrun on a READ operation or underrun on a WRITE operation occurs
when the FDC is not serviced by the CPU or DMA within the required time
interval.
3
NU
Not Used
-
2
ND
No Data
No data are available to the FDC when either of the following conditions is
met:
1. The floppy disk cannot find the indicated sector while the READ DATA or
READ DELETED DATA commands are executed, or
2. While executing a READ ID command, an error occurs upon reading the ID
field, or
3. While executing a READ A TRACK command, the FDC cannot find the
starting sector
1
NW
Not Writeable
Set when a WRITE DATA, WRITE DELETED DATA, or FORMAT A TRACK
command is being executed on a write-protected diskette.
0
MA
Missing Address
Mark
This flag bit is set when either of the following conditions is met:
1. The FDC cannot find a Data Address Mark or a Deleted Data Address Mark
on the specified track, or
2. The FDC cannot find any ID address on the specified track after two index
pulses are detected from the INDEX# pin
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IT86G 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|600V V(DRM)|8A I(T)RMS|TO-220