參數(shù)資料
型號： W83977TF(EOL)
英文描述： W83877TF plus KBC. CIR. RTC
中文描述： W83877TF加比聯(lián)。稅務(wù)局局長。時(shí)鐘
文件頁數(shù)： 30/161頁
文件大?。?/td> 592K
代理商： W83977TF(EOL)
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-21 -
Revision A1
2.1.5 Perpendicular Recording Mode
The FDC is also capable of interfacing directly to perpendicular recording floppy drives. Perpendicular
recording differs from the traditional longitudinal method in that the magnetic bits are oriented
vertically. This method packs more data bits into the same area.
FDCs with perpendicular recording drives can read standard 3.5" floppy disks, and can read and write
perpendicular media. Some manufacturers offer drives that can read and write standard and
perpendicular media in a perpendicular media drive.
A single command puts the FDC into perpendicular mode. All other commands operate as they
normally do. The perpendicular mode requires a 1 Mbps data rate for the FDC. At this data rate the
FIFO eases the host interface bottleneck due to the speed of data transfer to or from the disk.
2.1.6 FDC Core
The W83977EF/CTF 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
相關(guān)PDF資料
PDF描述
W83C42 KEYBOARD CONTROLLER
W83C42P KEYBOARD CONTROLLER
W83C45 Keyboard Controller
W83C45P Keyboard Controller
W83C553F-G W83C553F-G Highly Integrated System I/O Controller for Power PCTM (South Bridge) QFP 208
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W83977TF-P 制造商:WINBOND 制造商全稱:Winbond 功能描述:I/O chip disk drive adapter
W83977TF-PW 制造商:WINBOND 制造商全稱:Winbond 功能描述:I/O chip disk drive adapter
W83C42 制造商:WINBOND 制造商全稱:Winbond 功能描述:KEYBOARD CONTROLLER
W83C42P 制造商:未知廠家 制造商全稱:未知廠家 功能描述:KEYBOARD CONTROLLER
W83C43 制造商:WINBOND 制造商全稱:Winbond 功能描述:KEYBOARD CONTROLLER
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*