morimoto.kuninori@renesas.com wrote:
> Dear yoshii
> 
> Thank you for comment
> 
>>> I have question about sh-sci on SH7723.
>> ...
>>> seems return SCIF0_TXD value.
>> At least, old chips like 7709/7750 have SCPTR bit multiplexed.
>> It returns RXD when read, sets TxD when write.
> 
> Hmm.
> At least 7786/7785/7763 have SCSPTR register.
> It indicates RXD/TXD for me.
> 
> May be it is same as  7709/7750's SCPTR.
> (I don't have these manual)

You can get these from renesas website.

> 
>> What are SCPTR bits on SH7723 like?
> 
> But SH7723 doesn't have SCPTR/SCSPTR register.
> Therefore, I thought that it used IO port.
> 
> So, I thought that it should read RXD pin if it use IO port.
> 
>> # I think you would better asking your boss to put the HW manual on WWW.
> 
> Oops !
> Is SH7723's manual un-public one ?
> 

I think that this is coding miss.
If you check implemenation of other SH CPU's(e.g. SH7722),
you can understand that other CPU checked RXD bit.

I attached patch to fix this.

Best regards,
  Nobuhiro