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Robert Kenney
USA
2 Posts |
 Posted - 03/13/2005 : 14:53:39
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I am new to this programmer, and have a few used D8751 MCU's. I would
like to program these (4K onboard) but do not see them listed
with any adapters. Can I use the AT 89 adapter? |
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| Reply #1
usb
138 Posts |
Posted - 03/15/2005 : 12:23:22
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| The AT89 adapter is supportingD8751 and D87C51. The 87C51 should not have any problem. However for D8751, since it is not a CMOS chip, it will need much higher DC current for programming. You may need do some small modification on the programmer to increase the DC current when you reading/programming the D8751. Just replace the VCC control transistor to a higher current transistor, and use a DC power supply intead of the USB power cable. The on board VCC control transistor only be able to provide up to 200mA current. You may need a 500mA transistor. |
Edited by - usb on 03/15/2005 12:26:40 |
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| Reply #2
Robert Kenney
USA
2 Posts |
Posted - 03/16/2005 : 16:51:14
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Thanks for the reply. The documentation was somewhat confusing. As for
the chip, I misread it (the problem with old faded chips), it is a
D87C51 so I should not have to modify anything. |
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