Datasheet > TMS279X

TMS279X

更新时间： 2024-11-24 22:42:07

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
40页	334K
描述
FLOPPY DISK FORMATTERICONTROLLER FAMILY

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中文翻译

获取价格

数据手册

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TMS279X 数据手册

PROGRAMMABLE

PRODUCTS

TMS279X

FLOPPY DISK FORMATTERICONTROLLER FAMILY

JUNE 1984

On-Chip PILL Data Separator

On-Chip Write Precompensation Logic

Single + 5-V Supply

Accommodates Single-and Double-Density Formats

- MM3740 (FM)

- IBM34 (MFM)

Automatic Seek with Verify

Multiple Sector Read/Write

TTL Compatible

Programmable Control

- Selectable Track-to-Track Access

- Head Load Timing

Software Compatible with the FD179X Series

Soft Sector Format Compatibility

description

The TMS279X family are N-channel silicon

FEATURES

Single Density (FM)

Double Density (MFM)

True Data Bus

Inverted Data Bus

Side Select Out

2791 2793 2795

2797

gate MOS LSl devices which perform the

functions of a Floppy Disk Formatter/Controller

in a single chip implementation. The TMS279X,

which can be considered the end result of both

the Western Digital FD1771 and FD179X

designs, is IBM compatible in single-density

mode (FM) and System 34 compatible in

double-density mode (MFM). The TMS279X

Internal CLK Divide

contains all the features of its predecessor the FD179X plus a high performance phase-lock-loop data

separator as well as write precompensation logic. In double-density mode, write precompensation is

automatically engaged to a value programmed via an external potentiometer. In order to maintain

compatibility, the FD1771, FD179X and TMS279X designs were made as close as possible with the

computer interface, instruction set, and I/O registers being identical. Also, head load control is identical. In

each case, the actual pin assignments vary by only a few pins from any one to another.

The processor interface consists of an 8-bit bi-directional bus for data, status, and control word transfers.

The TMS279X is set up to operate on a multiplexed bus with other bus-oriented devices.

The TMS279X is TTL compatible on all inputs and outputs. The outputs will drive one TTL load or three LS

loads. The 2793 is identical to the 2791 except the DAL lines are true for systems that utilize true data

busses.

The 2795/7 has a side-select output for controlling double-sided drives.

Scanned and Edited by Michael Holley - Aug 21, 2001 - HolleyMJ@aol.com

Texas Instruments was a second source for the WD279X and this data sheet is almost identical to the

Western Digital WD279X-02 Data Sheet and Application Note. (But has larger figures and is more readable.)

Active low signals use a trailing # instead of an overbar.

12 3 4 5 6 7...40

中文翻译

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与TMS279X相关器件

型号	品牌	获取价格	描述	数据表
TMS279XN	TI	获取价格	FLOPPY DISK FORMATTERICONTROLLER FAMILY
TMS27C/PC256-10	TI	获取价格	TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT PROGRAMMABLE READ-ONLY MEMO
TMS27C/PC256-12	TI	获取价格	TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT PROGRAMMABLE READ-ONLY MEMO
TMS27C/PC256-15	TI	获取价格	TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT PROGRAMMABLE READ-ONLY MEMO
TMS27C/PC256-17	TI	获取价格	TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT PROGRAMMABLE READ-ONLY MEMO
TMS27C/PC256-20	TI	获取价格	TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT PROGRAMMABLE READ-ONLY MEMO
TMS27C/PC256-25	TI	获取价格	TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT PROGRAMMABLE READ-ONLY MEMO
TMS27C010-150JL	ROCHESTER	获取价格	UVPROM,
TMS27C010-170JL	ROCHESTER	获取价格	UVPROM, 128KX8, 170ns, CMOS, CDIP32, 0.600 INCH, WINDOWED, CERAMIC, DIP-32
TMS27C010-200JL	ROCHESTER	获取价格	UVPROM, 128KX8, 200ns, CMOS, CDIP32, 0.600 INCH, WINDOWED, CERAMIC, DIP-32

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