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D8255 数据表 (PDF) - Digital Core Design

D8255 Datasheet PDF - Digital Core Design
部件名 D8255
下载  D8255 下载

文件大小   125.39 Kbytes
  4 Pages
制造商  DCD [Digital Core Design]
网页  http://www.digitalcoredesign.com
标志 DCD - Digital Core Design
功能描述 Programmable Peripheral Interface

D8255 Datasheet (PDF)

Go To PDF Page 下载 数据表
D8255 Datasheet PDF - Digital Core Design

部件名 D8255
下载  D8255 Click to download

文件大小   125.39 Kbytes
  4 Pages
制造商  DCD [Digital Core Design]
网页  http://www.digitalcoredesign.com
标志 DCD - Digital Core Design
功能描述 Programmable Peripheral Interface

D8255 数据表 (HTML) - Digital Core Design

D8255 Datasheet HTML 1Page - Digital Core Design D8255 Datasheet HTML 2Page - Digital Core Design D8255 Datasheet HTML 3Page - Digital Core Design D8255 Datasheet HTML 4Page - Digital Core Design

D8255 产品详情

The D8255 is a programmable I/O device which is designed for use with all Intel and most other microprocessors. It provides 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation:



● Mode 0 - Basic Input/Output. This functional configuration provides simple input and output operations for each of the three ports. No „handshaking' is required, data is simply written to or read from a specified port. Mode 0 Basic Functional Definitions:

  ○Two 8-bit ports and two 4-bit ports.

  ○Any port can be input or output.

  ○16 different Input/Output configurations are possible in this Mode



● MODE 1 - Strobed Input/Output. This functional configuration provides a means for transferring I/O data to or from a specified port in conjunction with strobes or „handshaking' signals. In mode 1, Port A and Port B use the lines on Port C to generate or accept these „handshaking' signals. Mode 1 Basic functional Defini

tions:

   ○Two Groups (Group A and Group B).

   ○Each group contains one 8-bit data port and one 4-bit control/data port.

   ○The 8-bit data port can be either input or output Both inputs and outputs are latched.

   ○The 4-bit port is used for control and status of the 8-bit data port.



● MODE 2 - Strobed Bidirectional Bus I/O. This functional configuration provides a means for communicating with a peripheral device or structure on a single 8-bit bus for both transmitting and receiving data (bidirectional bus I/O). „Handshaking' signals are provided to maintain proper bus flow discipline in a similar manner to MODE 1. Interrupt generation and enable/disable functions are also

available. MODE 2 Basic Functional Definitions:

  ○Used in Group A only.

  ○One 8-bit, bi-directional bus port (Port A) and a 5-bit control port (Port C).

  ○The 5-bit control port (Port C) is used for control and status for the 8-bit, bi-directional bus port (Port A)



KEYFEATURES

●Compatible with industry standard 8255

●24 I/O lines individually programmed in 2 groups of 12:

   ○Group A - Port A and upper half of Port C

   ○Group B – Port B and lower half of Port C

●3 major modes of operation

   ○Mode 0 – Basic input/output

   ○Mode 1 – Strobed Input/output

  ○Mode 2 – Bi-directional Bus

●Control Word Read-Back Capability

●Direct Bit Set/Reset Capability

●Interrupt control functions

●No internal three states busses

●Fully synthesizable technology independent source code.




类似零件编号 - D8255

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Intel Corporation
D8255A INTEL-D8255A Datasheet
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类似说明 - D8255

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关于 Digital Core Design


Digital Core Design (DCD) is a company that specializes in providing intellectual property (IP) cores for microprocessors and microcontrollers. Founded in 1999 and based in Poland, DCD offers a wide range of IP cores, including 8051, AVR, Z80, 68000, and ARM cores, among others.

DCD's IP cores are used in a variety of applications, including automotive, industrial automation, medical devices, and consumer electronics. The company's IP cores are designed to be highly configurable and customizable, allowing customers to tailor the cores to their specific needs.

In addition to its IP cores, DCD offers a range of design services, including custom microcontroller design, FPGA design, and software development. The company has a team of experienced engineers who work closely with customers to develop custom solutions that meet their specific requirements.

*此信息仅供一般参考,对于因上述信息造成的任何损失或损害,我们概不负责。




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