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???
05/05/08 18:35
Modified:
  05/05/08 19:09

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#154442 - A possible end ?
Responding to: ???'s previous message
Hi, again, I believe it works, because I cut the 8-pin of DB25 connection with the 126, and change 126 to 125 and test it with:

http://www.mediafire.com/?qjxbngjt1mn

CUSTOM PINOUT:

STROBE1 -> NOT USED
STROBE2 -> NOT USED
RESET -> PIN 3
MOSI -> PIN 9
SCK -> PIN 2
MISO -> PIN 11

FRECUENCY <= FCLK/6 = (example) = 11.0592MHz/6 = 1.8432MHz

(Note: it works up to FCLK/2, but not always)

(More notes: I´m not sure but db25 is TTL?, if so I use HC126 this connection may require pull up resistors (I could use HCT but I don´t have it and in the weekend electronic houses are closed), however I didn´t place it and it still works(so I conclude that the port was not full loaded so VOH > 3.5V))

Some horrible resolution photos:

Free Image Hosting at www.ImageShack.us

Free Image Hosting at www.ImageShack.us

Free Image Hosting at www.ImageShack.us

Regards
Lee



List of 2 messages in thread
TopicAuthorDate
Visisp 52 does it works with at89s8253?            01/01/70 00:00      
   A possible end ?            01/01/70 00:00      

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