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???
03/02/06 13:24
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 		 #111069 - UART forever...
Responding to: ???'s previous message
Ali Moizi said:
1)Can we use the same Uart for Rs485 and Rs232, any hardware trick?

Yes. 232 and 485 differs electrically, so for both you need a level convertor; but the UART is the same. For 485, you might want a fancy auto-RTS (automatic turning of direction) capable UART, but not necessarily at all.

Ali Moizi said:
1A)How can we add a Uart to 8052.

  1. writing a software (bit-banged) UART
  2. interfacing a standard, parallel-interface, external UART, such as the 16C550 and similar
  3. interfacing a serial (SPI/I2C) interface UART - quite rare, see Maxim and Philips
  4. interfacing in any way an another '51 in the role of slave UART


Ali Moizi said:
2)If any one has list of Chips with 2uart and enhanced address recognitions xxxFA chips.yes 80c320 of Dallas. Please send me link for Atmel,Intel or other manufacture which have these derivatives.

As Andy already said, Keil has the list.

Ali Moizi said:
3)Can I use the PC serial port as a Master in Rs485 Network.

Yes. Most RS485 "networks" do so.

Jan Waclawek

List of 11 messages in thread
TopicAuthorDate
Same Uart for 2 Standards            01/01/70 00:00      
   Chips - parametric search            01/01/70 00:00      
   UART forever...            01/01/70 00:00      
      PC            01/01/70 00:00      
      Clarification            01/01/70 00:00      
         No            01/01/70 00:00      
         Yes!            01/01/70 00:00      
            May be possible            01/01/70 00:00      
   There's even a schematic.            01/01/70 00:00      
      422 and 485            01/01/70 00:00      
   Does this help?            01/01/70 00:00      

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