- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄3768 > IMS82C55AZ96 (Intersil)IC I/O EXPANDER 24B 44PLCC PDF資料下載
參數(shù)資料
| 型號： | IMS82C55AZ96 |
| 廠商： | Intersil |
| 文件頁數(shù)： | 7/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER 24B 44PLCC |
| 標(biāo)準(zhǔn)包裝： | 500 |
| 接口： | 可編程 |
| 輸入/輸出數(shù)： | 24 |
| 中斷輸出： | 無 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-LCC（J 形引線） |
| 供應(yīng)商設(shè)備封裝： | 44-PLCC |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁第5頁第6頁當(dāng)前第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁
15
FN6140.2
June 15, 2006
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 a 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 is flexible enough to
interface 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
MS82C55A, MQ82C55A, MP82C55A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IMS82C55AZ | IC I/O EXPANDER 24B 44PLCC |
| ATMEGA8535L-8JUR | MCU AVR 8K FLASH 8MHZ 44PLCC |
| IP82C55AZ | IC I/O EXPANDER 24B 40DIP |
| CS82C55A96 | IC I/O EXPANDER 24B 44PLCC |
| IS82C55A-5Z96 | IC I/O EXPANDER 24B 44PLCC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IMSA100-G17M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| IMSA100-G21I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| IMSA100-G21M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| IMSA100-G21S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| IMSA100-G30S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。