How can i know that SC16IS740 Referenc circuit design

[seonghyeokhong]

How can i know that SC16IS740 Referenc circuit design?

i want to know reference design of SC16IS7XX series 

and how to connect RS485 without transciever?

Can i connect directly RS 485 port to RXD, TXD?

[reyes]

Hi,

There is a Demo board kit using the SC16IS750 named OM6270, you can buy it directly from the following link: http://www.nxp.com/part/OM6270?lang_cd=en

Please find attached the schematics of this demo board that you can use as a reference for your circuit design.

Have a great day,
Jose

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[samuelhsieh2]

Hi Jose:

May I ask for advice for the OM6270 schematic?

I find the Xtal Y1 using 14.7465MHz in the schematic, but the datasheet of SC16IS0/750/760 show..1.8432MHz/3.072MHz.

Because Xtal 1.8432MHz/3.072MHz is going to EOL, I want to check that Is it ok to use 14.7465MHz ?  

Thanks!

Samuel

[reyes]

Hi Samuel,

Yes, it is it ok to use 14.7465MHz, we have been using this crystal value in our boards and it works as expected.

Have a great day,
Jose

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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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[samuelhsieh2]

Hi Jose:

Thanks for your quickly reply,

It's helpful.

Another question.. that if I want to use 9600 baud rate by UART, may I use 12.288MHz xtal for this application?

best regards,

Samuel

[reyes]

Hi Samuel,

Yes, 12.288MHZ xtals allows integer division to common ART baud rates up to 38400, so, 9600 is valid baud rate.

-Jose