Search found 3 matches

by mk279
Wed Apr 30, 2014 7:16 pm
Forum: Hardware
Topic: 68020
Replies: 6
Views: 35967

Re: 68020

Hi, I paste a state machine for the /DTACK generation for the SID (using only discrete logic ;) ) Since the synchronous interface is not used, the clocking of the CPU is more independent of the SID clock. Then the 68020 could be easily connected to the SID. I use the 1/8 clock divisision with a CPU ...
by mk279
Wed Apr 30, 2014 6:20 pm
Forum: Hardware
Topic: Updated UART
Replies: 6
Views: 48403

Re: Updated UART

Yes it's compatible to 68681. The initialization values of the registers match 68681 configuration. Furthermore the pinout can be mapped to the 68681 pinout, where an additonal pin (I/M) needs to be grounded for selecting the 68xxx mode. Unfortunately it's just available with PLCC, QFP, and HVQFN pa...
by mk279
Wed Apr 16, 2014 9:29 am
Forum: Hardware
Topic: Updated UART
Replies: 6
Views: 48403

Re: Updated UART

Hi Chris & Simon, sorry for reopening this oldish topic. But in my 68k project I recently used an even more advanced UART. It's the SC28L92 by NXP which is an enhaced 68681 with 16 bytes of TX/RX FIFOs ( http://www.nxp.com/documents/data_sheet/SC28L92.pdf ) Thus, it's especially usefull to lower...

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