RE: GPIO software design question
"Simon Wong" <swong-5bdsyQ5pCqFWk0Htik3J/[email protected]>
| Newsgroups | gmane.comp.hardware.microcontrollers.tini |
|---|---|
| Message-ID | <000b01c3d6db$10afe290$3b01000a@baal> |
I tried accessing the ALE signal. It's always low on my board. Very strange. I'm running double internally on the 80c400. -----Original Message----- From: Bryan Armstrong [mailto:bryan.armstrong-6tN4nzCoH/[email protected]] Sent: Thursday, January 08, 2004 6:54 AM To: Venelin Efremov Cc: swong-5bdsyQ5pCqFWk0Htik3J/[email protected]; [email protected] Subject: Re: [TINI]GPIO software design question Venelin Efremov wrote: > On board CPLD won't help you much, since it has no clock input., so you can > not load 8 bits and expect it to send them automatically. > Writing in ASM is the key, I managed to get around 1MBps using double clock > speed. > > ~Venelin It is possible to use ALE which comes in on IO22 from the TINIs400 schematic for the CPLD clock. The ALE signal is 1/4, 1/2, or 1/1 of the CPU crystal frequency depending on if you single, double, or quadruple it internally on the DS80C400. -- -- Bryan Armstrong bryan.armstrong-6tN4nzCoH/[email protected] _______________________________________________ TINI mailing list TINI-6tN4nzCoH/[email protected] To UNSUBSCRIBE, edit your profile, or see list archives: http://lists.dalsemi.com/mailman/listinfo/tini