active high chip select grrrr

fischer · ‎2004-08-16

Posted on August 17, 2004 at 08:16

fischer · ‎2011-05-17

Posted on May 17, 2011 at 12:02

hallo,

my active high chip select on porta is much longer than the data is valid

that i write to an lcd. ???!!!!

in psdexpress i select active high chip select for PA7

// PSD settings

// aaaaaaaaaaa

Bporta_dir=0x8D; // input=0

Bporta_data_out=0x7F;

Bporta_oe=0x81;

whats wrong?

fischer · ‎2011-05-17

Posted on May 17, 2011 at 12:02

thats it, i already found it.

i do not do so using other active low cs, there is no such problem ??!!

i do not use the _wr or _rd signals to gate the 2 other active low cs i use.

-strange-

why?

thanks !!!!!!!!!!!!!!!!!!