interfacing 89S52 to Winbond 29c020

- G
- gusnug
  
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posted
15 years ago

Thu, Jul 31, 2008 2:24 PM

Dear all I am a new comer to this blogs but microcontroller isn't new for me. I've had a problem to write and read data from Windbond 29C020. I've already followed the instruction from their data sheets. For clearness, I used SN74573 as a address latch enable, one 29C020 with Chip Enable grounded.

The first step that i was done to disable the write protection and read the production id on address 00000 and 00001 and its done (as i wish).

But the next step where i wrote the data into specific address and read back, there now data on it, means blank.

So I am stag...please comment if any. thanks alot

gusnug

- T
- TT_Man
  
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posted
15 years ago

Thu, Jul 31, 2008 2:41 PM

Read the data sheet carefully...... you have to start with an unlock sequence before you can write data.

- G
- gusnug
  
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posted
15 years ago

Fri, Aug 1, 2008 2:03 AM

thanks alot ...i've done it

I've

already

grounded.

read

- C
- CBFalconer
  
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posted
15 years ago

Fri, Aug 1, 2008 2:47 AM

Please do not top-post. Your answer belongs after (or intermixed with) the quoted material to which you reply, after snipping all irrelevant material. See the following links:

(taming google) (newusers)

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 [mail]: Chuck F (cbfalconer at maineline dot net) 
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            Try the download section.


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