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參數資料
型號: W83977TF
廠商: WINBOND ELECTRONICS CORP
英文描述: Multi-Function I/O Port Controller(用于個人計算機的多功能輸入/輸出口控制器)
中文描述: 多功能I / O端口控制器(用于個人計算機的多功能輸入/輸出口控制器)
文件頁數: 27/160頁
文件大小: 1012K
代理商: W83977TF
W83977TF
PRELIMINARY
Publication Release Date: April 1998
-19 -
Revision 0.62
2.1.6 FDC Core
The W83977TF FDC is capable of performing twenty commands. Each command is initiated by a multi-
byte transfer from the microprocessor. The result can also be a multi-byte transfer back to the
microprocessor. Each command consists of three phases: command, execution, and result.
Command
The microprocessor issues all required information to the controller to perform a specific operation.
Execution
The controller performs the specified operation.
Result
After the operation is completed, status information and other housekeeping information is provided to
the microprocessor.
2.1.7 FDC Commands
Command Symbol Descriptions:
C:
Cylinder number 0 - 256
D:
Data Pattern
DIR:
Step Direction
DIR = 0, step out
DIR = 1, step in
DS0:
Disk Drive Select 0
DS1:
Disk Drive Select 1
DTL:
Data Length
EC:
Enable Count
EOT:
End of Track
EFIFO:
Enable FIFO
EIS:
Enable Implied Seek
EOT:
End of track
FIFOTHR: FIFO Threshold
GAP:
Gap length selection
GPL:
Gap Length
H:
Head number
HDS:
Head number select
HLT:
Head Load Time
HUT:
Head Unload Time
LOCK:
Lock EFIFO, FIFOTHR, PTRTRK bits prevent affected by software reset
MFM:
MFM or FM Mode
MT:
Multitrack
N:
The number of data bytes written in a sector
NCN:
New Cylinder Number
ND:
Non-DMA Mode
OW:
Overwritten
PCN:
Present Cylinder Number
POLL:
Polling Disable
PRETRK:
Precompensation Start Track Number
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相關代理商/技術參數
參數描述
W83977TF(EOL) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:W83877TF plus KBC. CIR. RTC
W83977TF_98 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83977TF-A 制造商:WINBOND 制造商全稱:Winbond 功能描述:I/O chip disk drive adapter
W83977TF-AW 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83977TF-P 制造商:WINBOND 制造商全稱:Winbond 功能描述:I/O chip disk drive adapter