SCC or SMC for console ?

[Wolfgang Denk]

Dear Laurent,

in message <3C6BF3B1.2040906 at capflow.com> you wrote:
>
> I need 4 serial ports at runtime, and was wondering if I should rather
> use 2SMC + 2SCC or 4 SCC (or 1SMC + 3SCC).

Assuming that you need Ethernet: if you can use the FEC for Ethernet,
that it does not matter much; otherwise I'd recommend to use  2SMC  +
2SCC  or  1SMC  +  3SCC  so  that  you  have at east one SCC left for
Ethernet.

> I need a console, but no hardware flow control (which would force the
> use of SCC).

Should be no problem. The kernel on our FTP server was tested with  6
serial  ports  on  a  MPC860, with HW flow controll on all SCC's. The
only problem in such a configuration is that you have only 4 BRG's so
two ports have to share the baudrate with another port.

Wolfgang Denk

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