Re: mos 6551 / w65c51

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Tue, 24 Oct 2023 06:42:58 +0200 Message-ID: <3550a072-d468-43cc-bc9e-98c02ad8d7b1_at_laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 10/23/23 23:27, smf wrote:
> On 18/10/2023 16:26, Gerrit Heitsch wrote:
> 
>> NMOS/HMOS 6551 will stop transmitting the moment /CTS goes HIGH. That
>> can be in the middle of a byte being sent. This is documented in the
>> data sheet.
> 
> As you can't disable CTS checking, you are better off just grounding CTS
> and using some GPIO pin to read the actual CTS and do it in software.
> 
> No matter what 6551 you have.

The 65C51 behaves correctly, at least according to the datasheet.

  Gerrit