ARM Technical Support Knowledge Articles

COM1 (UART0) DOES NOT WORK

Applies to: MCBSTR9 Evaluation Board

Answer


Information in this article applies to:


QUESTION

My STR912 application uses UART0 (COM1) to communicate with my PC. However, I cannot communicate over this interface. Are there any known problems with this RS232 port?

ANSWER

Unfortunately, there is a mistake in the layout of board version 2. The pins P3.7 and P3.8 are connected to the RS232 driver instead of P3.0 and P3.1. As a workaround, please use COM2 (UART1) for the communication. The schematics of MCBSTR9 version 2 are attached to this article.

This problem is fixed in board version 3 and higher.

MORE INFORMATION

Article last edited on: 2006-11-30 14:43:02

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