參數(shù)資料
型號(hào)： 8406602QA
廠商： HARRIS SEMICONDUCTOR
元件分類： 微控制器/微處理器
英文描述： MB 61C 61#20 SKT RECP
中文描述： 24 I/O, PIA-GENERAL PURPOSE, CDIP40
文件頁(yè)數(shù)： 14/26頁(yè)
文件大小： 234K
代理商： 8406602QA
14
Reading Port C Status
(Figures 15 and 16)
In Mode 0, Port C transfers data to or from the peripheral
device. When the 82C55A is programmed to function in
Modes 1 or 2, Port C generates or accepts “hand shaking”
signals with the peripheral device. Reading the contents of
Port C allows the programmer to test or verify the “status” of
each peripheral device and change the program flow
accordingly.
There is not special instruction to read the status information
from Port C. A normal read operation of Port C is executed to
perform this function.
Applications of the 82C55A
The 82C55A is a very powerful tool for interfacing peripheral
equipment to the microcomputer system. It represents the
optimum use of available pins and flexible enough to inter-
face almost any I/O device without the need for additional
external logic.
Each peripheral device in a microcomputer system usually
has a “service routine” associated with it. The routine
manages the software interface between the device and the
CPU. The functional definition of the 82C55A is programmed
by the I/O service routine and becomes an extension of the
system software. By examining the I/O devices interface
characteristics for both data transfer and timing, and
matching this information to the examples and tables in the
detailed operational description, a control word can easily be
developed to initialize the 82C55A to exactly “fit” the
application. Figures 18 through 24 present a few examples
of typical applications of the 82C55A.
INTERRUPT
ENABLE FLAG
POSITION
ALTERNATE PORT C
PIN SIGNAL (MODE)
INTE B
PC2
ACKB (Output Mode 1)
or STBB (Input Mode 1)
INTE A2
PC4
STBA (Input Mode 1 or
Mode 2)
INTE A1
PC6
ACKA (Output Mode 1 or
Mode 2)
FIGURE 17. INTERRUPT ENABLE FLAGS IN MODES 1 AND 2
FIGURE 18. PRINTER INTERFACE
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC7
PC6
PC5
PC4
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC1
PC2
DATA READY
ACK
PAPER FEED
FORWARD/REV.
DATA READY
ACK
PAPER FEED
FORWARD/REV.
RIBBON
CARRIAGE SEN.
MODE 1
(OUTPUT)
82C55A
MODE 1
(OUTPUT)
CONTROL LOGIC
AND DRIVERS
INTERRUPT
REQUEST
PC0
INTERRUPT
REQUEST
PC3
HAMMER
RELAYS
HIGH SPEED
PRINTER
82C55A
相關(guān)PDF資料
PDF描述
8406601QA CMOS Programmable Peripheral Interface
8408 Quad 8-Bit Multiplying CMOS D/A Converter with Memory
8408RPFB Quad 8-Bit Multiplying CMOS D/A Converter with Memory
8408RPFE Quad 8-Bit Multiplying CMOS D/A Converter with Memory
8408RPFI Quad 8-Bit Multiplying CMOS D/A Converter with Memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
8406602QX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral Interface
8406602XA 制造商:Intersil Corporation 功能描述:CMOS PROGRAMMABLE PERIPHERAL INTRFC 44CLCC - Rail/Tube
8406602XX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral Interface
840669-000 制造商:TE Connectivity 功能描述:Data Bus Components A Wide Selection Of Couplers Such As Micros, Boxes, Flat-Packs, And Ultra Light Weight Versions 制造商:TE Connectivity 功能描述:DATABUS HARNESSES - Bulk 制造商:TE Connectivity 功能描述:D-500-0458-1-614-236
84067012A 制造商:Rochester Electronics LLC 功能描述:SMD 82C82 OCT LCH BUS DRIVER -20 PIN LCC - Bulk
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

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

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

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*