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interfacing of ISD1720 with PIC16F877a

 
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Yogi



Joined: 18 Jan 2015
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interfacing of ISD1720 with PIC16F877a
PostPosted: Sun Jan 18, 2015 1:58 am     Reply with quote
How to interface ISD1720 with PIC16F877A microcontroller...?
Ttelmah



Joined: 11 Mar 2010
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PostPosted: Sun Jan 18, 2015 8:46 am     Reply with quote
It's only SPI.
However a massive amount depends on what you actually want to 'do'?.
If you just want to control it (letting it store the data etc..), then the key is to get the 'design guide' (not the basic data sheet):
Code:

<http://www.vla.com.br/news/I1700%20Design%20Guide%20Rev%201.1.pdf>

It uses Mode3 SPI. Max 1MHz.
The design guide even has a nice little flow chart to follow.

If you want to do anything much 'beyond' the equivalent to the button based commands, then you'd be better off with a larger PIC. You'll certainly need a larger memory connected to the PIC for anything beyond this.
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Sun Jan 18, 2015 12:49 pm     Reply with quote
There are some threads in the forum archives on this topic. Search for this:
Quote:
isd17*

Example of search results:
http://www.ccsinfo.com/forum/viewtopic.php?t=45283
This is a 2-page thread that discusses SPI communications with the
isd1700-series chips.
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