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Two serial port microcontroller

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Moderators: Ajay Bhargav, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph, ExperimenterUK, DavesGarage

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mangesh.ghugal

Wed Jul 01 2009, 05:21AM

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hi,
Try to get the Philips 89c669 microcontroller which is having two serial ports and its a 8051 based only........

logistic

Wed Jul 01 2009, 06:13AM

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thank you. Is there a 40 pin version (DIL) like AT89S51 of this controller. Its really hard to solder these kind of IC's :blush

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Ajay Bhargav

Fri Jul 03 2009, 05:59AM

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you can go for this IC DS89C450/DS89C430
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4078

It also comes in DIP package.

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logistic

logistic

Fri Jul 03 2009, 07:12AM

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Thank you Ajay, i will try to look it up in our local market

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logistic

Sun Jul 05 2009, 05:09AM

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Can i change the value of SCON register for different UART modes

For example:

RS-485 i need to use the UART in 9 bit mode
RS-232 i need to use the UART in 8 bit mode

I have only one serial port (as the original purpose of this thread). Can i use both UARTs (8 bit, 9 bit) modes simultaneously?

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Ajay Bhargav

Mon Jul 06 2009, 01:55AM

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no you cannot, you have to reinitialize your uart registers to make changes in the mode. and only one kind of uart can work at a time.

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logistic

Mon Jul 06 2009, 06:46AM

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Ajay cant i use your software UART for 8 bit and actual UART for 9 bit?

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shyam

Mon Jul 06 2009, 07:27AM

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I know that the C8051F34x family have two serial ports.

sorry for replying so late.
C8051F34x are controllers supported by SILabs.
they have in circuit programming facility through USB.
you can anyway order there programmer for production.

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........