TL16C2550 Tri-state configuration

Terry Wu

Expert 1680 points

Other Parts Discussed in Thread: TL16C2550

Dear Sir,

Due to TL16C2550 D0~D7 bus share with other device like : NAND flash.

May I know how to tri-state this data bus correctly ?

Many thanks !

over 13 years ago

0 Joe Fockler over 13 years ago

TI__Expert 5230 points

The two UART elements in the 2550 share the data bus. The signals are bidrectional and should tri-state when not being actively driven by the processor.

Best Regards,

Joe

0 Terry Wu over 13 years ago in reply to Joe Fockler

Expert 1680 points

Dear Joe,

Sorry that my description is not clear enough.

I mean the TL16C2550 D0~D7 data bus connect to CPU and a NAND flash.

So I need to tri-state 16C2550 before access the NAND flash.

How to config 16C2550's D0~D7 to tri-state ?

Many thanks a lot !

0 Joe Fockler over 13 years ago in reply to Terry Wu

TI__Expert 5230 points

Hello Terry,

There isn't a register bit or external pin specifically for the D7-D0 pins. You would have to hold the 2550 in reset to tri-state the bus while accessing the NAND flash.

Best Regards,

Joe

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TL16C2550 Tri-state configuration