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68hc11 and 8255   [5 Articles]

I want to interface 8255 (Intel's PPI Programmable Peripheral interface) with Motorola's 68HC11. Has any one successfully interfaced 8255 to 68HC11 CPU. I tried to i...

Trying tointerface an hc11 with and 8255   [4 Articles]

I could uses Any advice you have on how to included an 8255PPI in the memory map of a HC11F1 as is on the nmix 022 board from NEwmicros. Could you please help me?...

Re: Interfacing with CMOS IC   [2 Articles]

Hello¡¡ I've implemented in my 68HC11 home-made evaluation board the CMOS version of the Three-Port expander 8255, it is, the 82C55. I haven't experienced any t...

Re: Interuppts

Yes I am a student ,No I already built my own program, I was asking for your help to gain a understanding of what mine did. I just put a delay loop in the interup...