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4026890
Internal and external communication
Description
Mind Map on Internal and external communication, created by Daniel Lugo on 13/11/2015.
Mind Map by
Daniel Lugo
, updated more than 1 year ago
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Created by
Daniel Lugo
almost 9 years ago
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Resource summary
Internal and external communication
Port
Is a connection
Is used to conect some devices
Allows exchange data
Serial Ports
Asynchronous adapter
Intercomunicar several computers together
Receives and sends information
25 pin
Serial interface connector
DTE (Data terminal Equipment)
DCE (Data Comunication Equipment)
1 Pin - P.G. - Safety Ground
2 Pin - TD -> DCE - DTE output
3 Pin - RD -> DTE - DTE input data
4 Pin RTS -> DCE - Request to Send DTE
5 Pin - CTS -> DTE - DCE ready to transmit
6 Pin - DSR-> DTe - CE ready to com . DTE
7 Pin - GND - Common ground circuit
8 Pin - DCD -> DTE - Stopping carrier
20 Pin - DTR -> DCE - Terminal Signal available
23 Pin - DSRD - Speed indicator TX
COM1 and COM2
Chip UART
Communication in one direction
Used addresses and a signal line
Parallel Port
I/O
Type D-25
25 Pin
It is used by printers
LPT (online printer)
DB25
Socket
36 Pin
8 bits = 1 byte
5 inputs "Steady-State Input points"
DATA
STATUS
CONTROL
17 signal lines and 8 ground lines
4. Control lines
5. state lines
8. Data lines
Media attachments
3eb49675-5b4a-43d3-b809-c89b694692ea (image/jpg)
721f3b75-2f19-4736-8b85-b052ae53d422 (image/jpg)
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